Complete each of the following calculations by providing the correct
Get college assignment help at Smashing Essays Question Complete each of the following calculations by providing the correct formula and values that you are using for each problem. Your grade will be based on selecting the appropriate formula, substituting the appropriate values, and correctly calculating the answer. A sample size of n = 120 produced the sample mean of = 24.3. Assuming the population standard deviation compute a 99% confidence interval for the population mean. Interpret the confidence interval. Assuming the population standard deviation how large should a sample be to estimate a population mean with a margin of error of 0.2 for a 95% confidence interval? The manager of a plant would like to estimate the mean amount of time a worker takes to complete a specific task. Assume the population standard deviation for this task is 4.1 minutes. After observing 70 workers completing the same type of task, the manager calculated the average time to be 12.7 minutes. Construct a 90% confidence interval for the mean task time. Interpret the confidence interval.How large a sample size n should he observe to decrease the margin of error to 0.5 minutes for the 90% interval? A sample of 25 was selected out of a specific population with mean equal to 18.4 and sample standard deviation of 3.6. Construct a 95% confidence interval for the mean of the population. Interpret the confidence interval. A group of students were randomly selected to participate in a study that compared the female grades to the male grades for a specific test. There were 15 females with a mean grade of 94.3 and sample standard deviation of 3.6. There were 12 males with a mean grade of 90.6 and sample standard deviation of 5.1. Construct a 90% confidence interval for the difference between the females’ and males’ test grades. Interpret the confidence interval.
Please solve this questions 9 to 14 and please tell
Question Please solve this questions 9 to 14 and please tell me how it works src=”/qa/attachment/8316381/” alt=”Q9-14.png” /> ATTACHMENT PREVIEW Download attachment Q9-14.png Problems 9 and 10. Use the following information to answer the questions. (Note: When interpreting a decision you must say something about the claim.) Weights. A government worker claims that the standard deviation of the mean weight of all U.S. Postal Service shipments is 0.40 pound. Assume that a hypothesis test is conducted. 9. How should you interpret a decision that rejects the null hypothesis? 10. How should you interpret a decision that fails to reject the null hypothesis? Section 7.2 Problems 11 and 12. Use the following information pertaining to a hypothesis test to answer the questions. The test is left-tailed, the standardized test statistic = = -1.69, and or = 0.05 11. Find the P-value for the hypothesis test. 12 . Decide whether to reject Ho for the given level of significance a. 13. Suppose that a right-tailed hypothesis test is being conducted and the P-value is 0.0132. What is the z-value that corresponds to this value? 2 14. Critical value. Find the critical value, 20, for the indicated type of test and level of significance Test: Right-tailed, a = 0.08.
I don’t know what it means this questions. please tell
Question I don’t know what it means this questions. please tell me answers how it works src=”/qa/attachment/8316383/” alt=”Q15-19.png” /> ATTACHMENT PREVIEW Download attachment Q15-19.png Problems 15-18. Use the following information to answer the questions. Using critical values. Suppose that for a two-tailed hypothesis test the critical values are zo = 1.96 and -20 = -1.96. State whether you would reject or fail to reject the null hypothesis if the standardized test statistic z has the values listed below. 15. 2 = 1.98 16. 2 = -1.89 17. 2 = 1.65 18. 2 = -1.99 19. z-test. Test the claim about the population mean / at the given level of significance o using the given sample statistics. (Note: See the note about testing claims at the top of the first page of this assignment.) Claim: /
I’m really struggling with a couple parts of this problem,
Question I’m really struggling with a couple parts of this problem, looking for some help. />According to a national study, 20% of college students pay off their credit card bill each month. In a recent survey, a random sample of 800 college students showed that 128 pay off their credit card bill each month. Do the data indicate that the true proportion of college students who pay off their credit card bill each month is different from 0.20? Use a 0.02 level of significance 1) State the null and alternative hypothesis. 2) Calculate the test statistic; show work below. 3) Determine the P-value. 4) State the decision and a conclusion.
I don’t know how to phrase my question…. I need
Question I don’t know how to phrase my question…. I need help with the questions below. src=”/qa/attachment/8316812/” alt=”Screen Shot 2019-07-01 at 1.08.19 AM.png” /> Attachment 1 Attachment 2 Attachment 3 Attachment 4 Attachment 5 Attachment 6 Attachment 7 Attachment 8 ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.06.50 AM.png An economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y represent the number of entry-level jobs in the same neighborhood. A sample of six Denver neighborhoods gave the following information (units in hundreds of jobs). x 15 33 3 53 28 50 25 4 5 5 9 3 Complete parts (a) through (e), given Ex = 204, Zy = 29, Ex = 8032, Ey = 165, Exy = 1107, and r = 0.733. (a) Draw a scatter diagram displaying the data. Tools 10 Actions 1. Select an object from the Tools menu to the left. 2. Enter coordinates in Object Properties below, or use the mouse to place and move objects To enter a fractional or decimal coordinate, use Object Properties. View our tutorial videos Object Properties Select a Tool or Object to Begin Help WebAssign graphing tool (b) Verify the given sums Ex, Ey, Ex, Eye, Exy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) EX = Ey = EX2 = Ey2 = Exy = r = (c) Find x, and y. Then find the equation of the least-squares line , = a bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) X =Read more ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.07.01 AM.png (d) Graph the least-squares line. Be sure to plot the point ()7, 
as a point on the line. In s (/77 s o a m in m m 5n an m m an m in in y , m *7 m (e) Find the value of the coefficient of determination rzr What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for :2 to three decimal places. Round your answers for the percentages to one decimal place.) r2 = explained “/a unexplained “lo (f) For a neighborhood with x = 37 hundred jobs, how many are predicted to be entry level jobs? (Round your answer to two decimal places) hundred jobs ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.07.18 AM.png It is thought that basketball teams that make too many fouls in a game tend to lose the game even if they otherwise play well. Let x be the number of fouls more than (i.e., over and above) the opposing team. Let y be the percentage of times the team with the larger number of fouls wins the game. X 4 y 45 5 49 33 26 Complete parts (a) through (e), given Ex = 16, Ey = 153, Ex2 = 78, Ey2 = 6191, Exy = 550, and r z -0.900. (a) Draw a scatter diagram displaying the data. Tools Actions 1. Select an object from the Tools menu to the left. 3 . 2. Enter coordinates in Object Properties below, or use the mouse to place and move objects. To enter a fractional or decimal coordinate, use Object Properties. View our tutorial videos Object Properties Select a Tool or Object to Begin Help WebAssign graphing tool (b) Verify the given sums Ex, Ey, Ex, Ey, Exy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) EX = Ey = EX2 = Ey2 = Exy = r = (c) Find x, and y. Then find the equation of the least-squares line , = a bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) X = y= ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.07.31 AM.png (d) Graph the least-squares line. Be sure to plot the point (x, y) as a point on the line. ss’ 55
The coefficient of determination of a set of data points
Question The coefficient of determination of a set of data points is 0.8 and the slope of the regression line is -9.3. Determine the linear correlation coefficient of the data.
I keep getting stuck on the steps to these problems,
Question I keep getting stuck on the steps to these problems, could you please right out the steps to solving these problems and an explanation on how to use the formula? Attachment 1 Attachment 2 Attachment 3 Attachment 4 Attachment 5 Attachment 6 Attachment 7 Attachment 8 ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.06.50 AM.png An economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y represent the number of entry-level jobs in the same neighborhood. A sample of six Denver neighborhoods gave the following information (units in hundreds of jobs). x 15 33 3 53 28 50 25 4 5 5 9 3 Complete parts (a) through (e), given Ex = 204, Zy = 29, Ex = 8032, Ey = 165, Exy = 1107, and r = 0.733. (a) Draw a scatter diagram displaying the data. Tools 10 Actions 1. Select an object from the Tools menu to the left. 2. Enter coordinates in Object Properties below, or use the mouse to place and move objects To enter a fractional or decimal coordinate, use Object Properties. View our tutorial videos Object Properties Select a Tool or Object to Begin Help WebAssign graphing tool (b) Verify the given sums Ex, Ey, Ex, Eye, Exy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) EX = Ey = EX2 = Ey2 = Exy = r = (c) Find x, and y. Then find the equation of the least-squares line , = a bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) X =Read more ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.07.01 AM.png (d) Graph the least-squares line. Be sure to plot the point ()7, as a point on the line. In s (/77 s o a m in m m 5n an m m an m in in y , m *7 m (e) Find the value of the coefficient of determination rzr What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for :2 to three decimal places. Round your answers for the percentages to one decimal place.) r2 = explained “/a unexplained “lo (f) For a neighborhood with x = 37 hundred jobs, how many are predicted to be entry level jobs? (Round your answer to two decimal places) hundred jobs ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.07.18 AM.png It is thought that basketball teams that make too many fouls in a game tend to lose the game even if they otherwise play well. Let x be the number of fouls more than (i.e., over and above) the opposing team. Let y be the percentage of times the team with the larger number of fouls wins the game. X 4 y 45 5 49 33 26 Complete parts (a) through (e), given Ex = 16, Ey = 153, Ex2 = 78, Ey2 = 6191, Exy = 550, and r z -0.900. (a) Draw a scatter diagram displaying the data. Tools Actions 1. Select an object from the Tools menu to the left. 3 . 2. Enter coordinates in Object Properties below, or use the mouse to place and move objects. To enter a fractional or decimal coordinate, use Object Properties. View our tutorial videos Object Properties Select a Tool or Object to Begin Help WebAssign graphing tool (b) Verify the given sums Ex, Ey, Ex, Ey, Exy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) EX = Ey = EX2 = Ey2 = Exy = r = (c) Find x, and y. Then find the equation of the least-squares line , = a bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) X = y= ATTACHMENT PREVIEW Download attachment Screen Shot 2019-07-01 at 1.07.31 AM.png (d) Graph the least-squares line. Be sure to plot the point (x, y) as a point on the line. ss’ 55
In regression analysis, if the coefficient of correlation is -1.0,
Question In regression analysis, if the coefficient of correlation is -1.0, then: A. the sum of squares for error and sum of squares for regression are equal. B. the sum of squares for regression is 1.0. C. the sum of squares for error is -1.0. D. the sum of squares for regression and total variation in y are equal.
This question was created from A4.pdf https://www.coursehero.com/file/42875280/A4pdf/ VO2max file: https://drive.google.com/file/d/1HKCOMK0V-guJ23VBBtEjbJuAH_OMb3pF/view?usp=sharing
Question This question was created from A4.pdf https://www..com/file/42875280/A4pdf/ VO2max file: https://drive.google.com/file/d/1HKCOMK0V-guJ23VBBtEjbJuAH_OMb3pF/view?usp=sharing ATTACHMENT PREVIEW Download attachment 42875280-323479.jpeg 5. [1 1 marks} A new exercise program is proposed to increase the V01 max (a measure of fitness in mllkgtmin} of mil with sedentary lifestyles. The researchers randomly recruited 25 such men fi’om their local health care centre. They measured the Vi]: max of each individual at the start of the study {pro} and then again after 6 months of participating in the exercise program (poet). The data are available in the file vosmax . oev. a. {2 marks} What are the null and alternative hypotheses? b. {1 mark} What is the value of the test statistic? c. {1 mark} What is the distribution of the test statistic ii’ the null hypothesis is trne‘lI d. {1 marks} What is the p-value? e. {2 marks} Using a significance level of 5%, state your conclusions about this test in the language of the problem. f. {4 marks} Name the two key unstated assumptions required for the validity of your hypothesis test and explain why they are reasonable in this context.
A random sample of 6 and 8 employees of the
Question A random sample of 6 and 8 employees of the Research and Training Divisions, respectively, were interviewed. the average number of days that the staff in the research division goes on official travel is 4.6 days per person per month, while for the training division has a monthly average of 3.2 days per person. if the corresponding estimated variances for the two divisions are 2.62 and 1.37, respectively, can we establish at the 1% level of significance that there is a difference in the average official travel time?
Hello there,Can someone please help me with the below question?In
Get college assignment help at Smashing Essays Question Hello there,Can someone please help me with the below question?In the upcoming election for governor, the most recent poll, based on 900 respondents, predicts that the incumbent will be reelected with 55 percent of the votes. What is σρˆσρ^? rev: 03_21_2019_QC_CS-163251.00825.0166.0247.0003
Between style=”color:rgb(0,0,0);”>18701870 and 20122012, carbon dioxide (CO2) concentration in the
Question Between style=”color:rgb(0,0,0);”>18701870 and 20122012, carbon dioxide (CO2) concentration in the atmosphere rose from roughly 261261 parts per million to 376376 parts per million. Assume that this growth can be modeled with an exponential function Upper Q equals Upper Q 0 times left parenthesis 1 plus r right parenthesis Superscript tQ=Q0×(1 r)t. Complete parts (a) and (b) below.a. By experimenting with various values of the growth rate r, find an exponential function that fits the data for 18701870 and 20122012. ralmost equals≈nothing(Round to five decimal places as needed.)b. Use this exponential model to predict when the CO2 concentration will double its 18701870 level. According to this model, the CO2 concentration will double its 18701870 level in in whole number form
A. Which of the following chemical formulas are incorrect? Select
Question A. Which of the following chemical formulas are incorrect? Select all that apply.NaO2RbClK2SAl2Cl3MgP2B. Enter the formula for all compounds correctly in the same order as in the previous question. Use a comma to separate compounds.
How many sigma (sigma) and pi (pi) bonds are present
Question How many sigma (sigma) and pi (pi) bonds are present in the following molecule?
Can you explain why Manganese (IV) oxide is MnO_2 and
Question Can you explain why Manganese (IV) oxide is MnO_2 and not Mn_2O_4?
This question was created from Issue Surrounding statistical data https://www.coursehero.com/file/18908482/Issue-Surrounding-statistical-data/
Question This question was created from Issue Surrounding statistical data https://www..com/file/18908482/Issue-Surrounding-statistical-data/ utilization of statistical data in criminal justice policy making? ATTACHMENT PREVIEW Download attachment 18908482-323512.jpeg
I am having some trouble understanding how to do these
Question I am having some trouble understanding how to do these two questions. I tried writing out what I know but I would like to know how to find the minimal sample size, and a sample size for the other question. ATTACHMENT PREVIEW Download attachment 66153174_458975868222993_1539362565748948992_n.jpg Question #3. (22 marks)_Lecture Week 5, Lecture 2 a) A cheese company wants to estimate the mean cholesterol content of its soft cheeses. They want their estimate to be within 0.5 milligrams (mg) and they assume the standard deviation of cholesterol in their soft cheeses to be 2.0 mg. If it is assumed that the distribution of cholesterol in their cheese follows a normal distribution, determine the minimal size sample required to construct a 95% confidence interval for the mean concentration of cholesterol in their cheeses. (2) 95 % confidence Standard Deviation = 2.Omg b) In the palliative care ward, a young doctor conducted a survey to determine the average length of stay of patients. The doctor reported that the 99 percent confidence interval for the mean stay period ranged from 86 to 94 days. S/he was sure that the sample standard deviation was 13 days and that the sample size was at least 30. But s/he could not remember the sample size. From this information, you should be able to help him/her out. (2) Page 6 Assignment #2; HSLC 3800 Summer 2019
Alwaysgreen currently serves 20% if the single-family homes in the
Question Alwaysgreen currently serves 20% if the single-family homes in the US. assuming binomial distribution is the probability that alwaysgreen serve at least 5 homes in a random sample of 18 single-family homes?
How do a pure covalent bond, a polar covalent bond,
Question How do a pure covalent bond, a polar covalent bond, and an ionic bond differ?
How is a covalent bond different from an ionic bond?
Question How is a covalent bond different from an ionic bond?
Decision analysis. After careful testing and analysis, an oil company
Question Decision analysis. After careful testing and analysis, an oil company is considering drilling in two different sites. It is estimated that site A will net $40 million if successful (probability .3) and lose $4 million if not (probability .7); site B will net $80 million if successful (probability .2) and lose $6 million if not (probability .8). Which site should the company choose according to the expected return from each site?What is the expected return for site A?What is the expected return for site B?Which site should the company choose? Site A, or site B?
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