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(c) Use a calculator to verify that Σ(x) = 61,

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Question (c) Use a calculator to verify that Σ(x) = 61, Σ(x2) = 991, Σ(y) = 646, Σ(y2) = 94,090, and Σ(x y) = 9,473. Compute r. (Enter a number. Round your answer to three decimal places.)

Discussion topic Flip a coin ten times and record observed

Question Discussion topic Flip a coin ten times and record observed no of heads and tails. Set one 10 flips — my results Heads 6 tails 4set two 20 flips – my results 12 heads and 8 tails. set three 70 flips 38 heads and 32 tails ( for 100 flips total) We would expect that the distribution of heads and tails be 50/50 Question : how far away from 50/50 am I for each sample and reflect why this might happen.

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Question Thank You,I got this question wrong. ATTACHMENT PREVIEW Download attachment q1.PNG

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Question Didn’t understand this question and got a wrong answer. Thank You for your help. src=”/qa/attachment/8347260/” alt=”q2.PNG” /> ATTACHMENT PREVIEW Download attachment q2.PNG

The average house has 14 paintings on its walls. Is

Question The average house has 14 paintings on its walls. Is the mean larger for houses owned by teachers? The data show the results of a survey of 13 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal.17, 17, 16, 16, 16, 15, 13, 16, 14, 15, 13, 13, 16What can be concluded at the α= 0.05 level of significance?a.) for this study should we use the t-test or z-test?b.) The null and alternative hypotheses would be:   H0:____ ____ ____H1:____ ____ ____c.) The test statistic ____=_____(please show to 3 decimal places)d.) the p-value=______please show to 4 decimal placese.) the p value is_____F.) Based on this we should either fail to reject, reject or accept the null hypothesis g.)Thus, the final conclusion is that …1.)The data suggest the populaton mean is significantly more than 14 at α = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in teachers’ houses is more than 14.2.)The data suggest the population mean is not significantly more than 14 at α = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in teachers’ houses is equal to 14.3.)The data suggest that the population mean number of paintings that are in teachers’ houses is not significantly more than 14 at α= 0.05, so there is insufficient evidence to conclude that the population mean number of paintings that are in teachers’ houses is more than 14.h.)Interpret the p-value in the context of the study.1.)If the population mean number of paintings that are in teachers’ houses is 14 and if you survey another 13 teachers then there would be a 0.74% chance that the sample mean for these 13 teachers would be greater than 15.15.2.)If the population mean number of paintings that are in teachers’ houses is 14 and if you survey another 13 teachers then there would be a 0.74% chance that the population mean number of paintings that are in teachers’ houses would be greater than 14.3.) There is a 0.74% chance of a Type I error.4.)There is a 0.74% chance that the population mean number of paintings that are in teachers’ houses is greater than 14.i.)Interpret the level of significance in the context of the study.1.)If the population mean number of paintings that are in teachers’ houses is more than 14 and if you survey another 13 teachers, then there would be a 5% chance that we would end up falsely concuding that the population mean number of paintings that are in teachers’ houses is equal to 14.2.)If the population mean number of paintings that are in teachers’ houses is 14 and if you survey another 13 teachers, then there would be a 5% chance that we would end up falsely concuding that the population mean number of paintings that are in teachers’ houses is more than 14.3.)There is a 5% chance that the population mean number of paintings that are in teachers’ houses is more than 14.4.)There is a 5% chance that teachers are so poor that they are all homeless.

Thank you for all your help. Will you please explain

Question Thank you for all your help. Will you please explain me how this question work because I don’t understand I got that wrong. ATTACHMENT PREVIEW Download attachment q3.PNG

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Question />I have no idea about this question. Please help me solve this problem thank you. I need the solution with details. Attachment 1 Attachment 2 ATTACHMENT PREVIEW Download attachment 1.png 4. A nutritional study reveals that there is Vitamin B-complex deficiency in a certain population. Specifically, the following probabilities are found prior to any other information: (1) 10% of the population is deficient in Vitamin B1 (Thiamine). (ii) 20% of the population is deficient in Vitamin B2 (Riboflavin). (iii) 30% of the population is deficient in Vitamin B3 (Niacin). (iv) 40% of the population has no Vitamin B deficiency. As part of the study, the following additional information is also found: (v) Alcoholics comprise 35% of the Bi-deficient group. (vi) Alcoholics comprise 30% of the B2-deficient group. (vii) Alcoholics comprise 25% of the B3-deficient group. (viii) Alcoholics comprise 20% of the non-deficient group. (a) Express each of these statements into an equivalent probability statement. * (8 pts) Click here. (b) Calculate the probability that a randomly selected individual from this population is alcoholic. Show all work! (6 pts) ATTACHMENT PREVIEW Download attachment 2.png (c) Calculate the posterior probability that a randomly selected alcoholic is in each of these Vitamin B groups. Show all work! (8 pts) (d) Interpret the findings: Compare the prior and posterior probabilities of each group. Be as specific as possible. (8 pts)

Question: Question 1 Is Regression Analysis always useful in predicting

Question Question: Question 1 Is Regression Analysis always useful in predicting values? Discuss with examples. Question 2 A regression line, derived from the least squares mentod (OLS), has only two properties. True or false. If yes, explain. If no, explain with examples Question 3. There is no difference(s) between the standard error of the sample mean and the standard error of the regression. If true, explain. If false, explain. Question 4. Does the correlation coefficient and the regression r-squared measure the same concepts. Explain

Help me to understand this question. Thank You, for your

Question Help me to understand this question. Thank You, for your help. alt=”q4.PNG” /> ATTACHMENT PREVIEW Download attachment q4.PNG

The work week for adults in the US that work

Question The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 1% level of significance. Give answer to at least 4 decimal places.Hours: 47,48,55,51,45,60,56,57,47,45,52,52What are the correct hypotheses?  H0:______ ________ _______hoursH1:______ _________ ________hoursBased on the hypotheses, find the following: Test Statistic=_______p-value=_______The correct decision is to either accept the null hypothesis, accept the alternative hypothesis, reject the null hypothesis or fail to reject the null hypothesis?The correct summary would be:  either there is enough evidence to support the claim, there is enough evidence to reject the claim, there is enough evidence to reject the claim or there is not enough evidence to support the claim___________ that the mean number of hours of all employees at start-up companies work more than the US mean of 47 hours.

HO: μ ≤16.49 VS HA: μ >16.49What is the test

Question HO: μ ≤16.49 VS HA: μ >16.49What is the test statistic for sample of size 21, mean 12.78 and a standard deviation of 1.11. Enter the test statistic with 2 decimal places?

This question was created from Final Review https://www.coursehero.com/file/22126264/Final-Review/ I am

Question This question was created from Final Review https://www..com/file/22126264/Final-Review/ I am not sure how what to do next after finding the t value, which i got (-2.14). How is the p value calculated ? ATTACHMENT PREVIEW Download attachment 22126264-326537.jpeg b. The sample data of 25 Ohio administrators in contained in the file named Administrator. What is the p-value for your hypothesis test in part (a)?

and Abstract for capstone project

In the attachment you will find my capstone project, I need you to write for me conclusion and abstract for this project. this project is about creating a game to help people implement the concept of “run, hide, and fight” you will see all the details in the attachment. the abstract should be brief and cover the whole project as well as the conclusion the papers should utilize APA style format

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Question I got this question wrong i don’t know why. ATTACHMENT PREVIEW Download attachment q6.PNG

For a population with a mean equal to 100and a

Question For a population with a mean equal to 100and a standard deviation equal to 35, calculate the standard error of the mean for the following sample sizes.​a)  20b) 40​c) 60​a) The standard error of the mean for a sample size of 20 is____ ​(Round to two decimal places as​ needed.)​b) The standard error of the mean for a sample size of 40 is____ ​(Round to two decimal places as​ needed.)​c) The standard error of the mean for a sample size of 60 is____ ​(Round to two decimal places as​ needed.)

Suppose that BC financial aid alots a textbook stipend by

Question Suppose that BC financial aid alots a textbook stipend by claiming that the average textbook at BC bookstore costs $69.5. You want to test this claim.The null and alternative hypothesis in symbols would be:_________The null hypothesis in words would be:1.)The average price of all textbooks from the store is $69.52.)The average of price of all textbooks from the store is greater than $69.5.3.)The average price of textbooks in a sample is $69.54.)The proportion of all textbooks from the store that are less than 69.5 is equal to 50%5.)The average of price of all textbooks from the store is less than $69.5.Based on a sample of 80 textbooks at the store, you find an average of 82.9 and a standard deviation of 29.6.The point estimate is: _______please round to three decimal placesThe 99 % confidence interval (use z*) is: _________to________(to 3 decimal places)Based on this we either reject the null hypothesis or fail to reject the null hypothesis?

For a population that is left skewed with a mean

Question For a population that is left skewed with a mean of 21 and a standard deviation equal to 10​, determine the probability of observing a sample mean of 18 or more from a sample of size 32?What is the probability of observing a sample mean of 18 or more from a sample of size 32P(x≥18)=_____​(Round to four decimal places as​ needed.)

) Consider each of the following variables. For each one,

Question ) Consider each of the following variables. For each one, state whether it is quantitative or qualitative. State whether the quantitative ones are continuous or discrete.State what type of scale the continuous ones are measured on. State whether thequalitative ones are nominal or ordinal.(i) The weight of a baby at birth, given in kilograms. (1)(ii) Answers to the question What country were you born in?” (1)(iii) For each day of the year, the difference between the maximum outside temperature recorded at mount Atlas and the minumum outside temperaturerecorded at mount Atlas, given in degrees Celsius. (1)(iv) For each member of the English national football team, their total number ofappearances at the Africa Cup of Nations. (1)(b) An industry survey of people in sales management positions gave the number ofyears of experience in sales related positions as shown below. Males FemalesSample size 80 70Mean years 21.7 18.5Standard deviation years 9.3 4.8(i) Construct a 95% confidence interval for the difference of population means. (3)(ii) Perform a test to determine if the mean number of years for males in salesrelated positions is more than one year larger than that of females? (4)(c) The promoter of a touring dance show wishes to analyse how the price per ticketaffects the size of its audiences. She tests two prices, $140 and $160, over 10 showseach which give rise to the following attendances.Price$140 120 115 130 127 124 110 121 129 118 122$160 111 107 101 115 111 105 99 104 110 98(i) Calculate the mean and standard deviation of the attendance for each sample. (4)(ii) Perform a statistical test to determine whether the variances of the attendanceare equal under the two prices. (3)(iii) Perform a t-test to determine whether the mean attendance is the same underthe two prices. (4)Page 4(iv) Calculate a 95% confidence interval for the difference between the mean showrevenue under each price. (4)(v) Without doing any further calculations, comment on which price the promotershould choose.

Consider the data set. 2, 3, 4, 5, 9 (a)Find

Question Consider the data set. 2, 3, 4, 5, 9 (a)Find the range. (Enter an exact number.) (b)Use the defining formula to compute the sample standard deviation s. (Enter a number. Round your answer to two decimal places.) (c)Use the defining formula to compute the population standard deviation σ. (Enter a number. Round your answer to two decimal places.)

I don’t know how this one is incorrect. Thank You,

Question I don’t know how this one is incorrect. Thank You, ATTACHMENT PREVIEW Download attachment q7.PNG

Consider the following ordered data. 4 7 7 8 9

Question Consider the following ordered data. 4 7 7 8 9 9 10 11 12 (a) Find the low, Q1, median, Q3, and high. (For each answer, enter a number.) low Q1 median Q3 high (b) Find the interquartile range. (Enter a number.)

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