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I need help with this problem. SHORT RESPONSE answer on

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Question I need help with this problem. SHORT RESPONSE  answer on a separate piece of paper. 1) A stratified sample is one in which the population is first divided into at least two different categories, such as male and female, and then a sample is drawn from each category. Consider a survey that asks students at your school the question “Should mathematics classes be taught so that all female students are in the same class and all male students are in another?” Part A Describe a stratified sampling procedure to study the question. Part B Describe one way in which your sample might not be representative of the students at your school.2) SHORT RESPONSE  answer on a separate piece of paper. A city bus service is thinking about switching the brand of tires it uses on its buses. One manager has suggested outfitting half of the buses used on the freeway connecting the city to a neighboring city with the current brand and half with the new brand, because it would be too expensive to outfit half of all the buses with the new brand. The tread depth of each tire would be monitored for several months. The brand that showed the least wear and experienced the fewest failures would be adopted for use on all city buses as their old tires wear out. Suggest a modification to this sampling plan that would improve the ability of the test to determine which brand of tire has the better durability. Explain your reasoning.

Viewing Audience Yes NoGeneral TV 37 174Video on Demand 122

Question Viewing Audience Yes NoGeneral TV 37 174Video on Demand 122 122 style=”color:rgb(0,0,0);”>Does cable​ video-on-demand (VOD) increase ad​ effectiveness? A study compared general TV and VOD audiences after viewing a brand ad. Whether the viewer indicated that the ad made them want to visit the brand website was collected and organized in the accompanying table. Complete parts​ (a) through​ (c) below.Set up null and alternative hypotheses to try to determine whether there is a difference in ad impact between general TV viewing and VOD viewing. a. Let group 1 be the general TV​ audience, and let group 2 be the VOD audience. State the null and alternative hypotheses. Choose the correct answer below.D. H0: π1 = π2 H1: π1 does not equal π2b. Conduct the hypothesis test defined in​ (a), using the 0.01 level of significance. Calculate the test statistic.X2STAT=

_ A B C Total1 15 30 45 902 40

Question _ A B C Total1 15 30 45 902 40 50 60 150a. style=”background-color:transparent;color:rgb(0,0,0);”> Compute the expected frequencies for each cell. A B C12

When performing a χ2 test for independence in a contingency

Question When performing a χ2 test for independence in a contingency table with r rows and c​ columns, determine the​ upper-tail critical value of the test statistic in each of the following circumstances.a. α=0.05, r=5, c=3b. α=0.01. r=6, c=4c. α=0.01, r=6, c=3d. α=0.01, r=5, c=3e. α=0.01, r=4, c=6a. Determine the upper-tail critical value of the test statistic using the values given in the problem statement for part (a)The critical value is ___

Summated_Rating Cost_($_per_person)54 3969 4966 6066 5866 4158 3852 4462 4351

Question Summated_Rating Cost_($_per_person)54 3969 4966 6066 5866 4158 3852 4462 4351 3551 3454 3949 3574 8664 5256 3847 3656 3344 2555 4254 4667 6365 6053 2573 4965 49A magazine publishes restaurant ratings for various locations around the world. The magazine rates the restaurants for​ food, dModifyingAbove e with accente​cor, ​service, and the cost per person. Develop a regression model to predict the cost per​ person, based on a variable that represents the sum of the three ratings. The magazine has compiled the accompanying table of this summated ratings variable and the cost per person for 25 restaurants in a major city. Complete parts​ (a) through​ (e) below.Assuming a linear​ relationship, use the​ least-squares method to compute the regression coefficients b0 and b1.b0= ___ and b1= ____

I need to find the standard deviation of 47,62,39,41,44,35,78,53,51,44

Question I need to find the standard deviation of 47,62,39,41,44,35,78,53,51,44

mmmm here is the question.. have fun and eat ricecake

Question mmmm here is the question.. have fun and eat ricecake ATTACHMENT PREVIEW Download attachment Capture.PNG

here is the question.. have so much funn!! it will

Question here is the question.. have so much funn!! it will be funny becayse this is a funny course ATTACHMENT PREVIEW Download attachment Capture.PNG

For study purposes please explain. ATTACHMENT PREVIEW Download attachment STAT

Question For study purposes please explain. ATTACHMENT PREVIEW Download attachment STAT 21.jpg Week 1 Homework Chun X D / DRthopage ) Pageview | All Readaloud . Rack 21. The following question might be addressed in an experiment Does listening to Mozart make the skuly mase thickagent? If a researcher were to design the experiment, how would he choose the treatment and control groups? Should the experiment be single blind, double-blind, or neither? Explain your reasoning What would he choose as the treatment group? Select the correct answer backw O A. Anyone that listens to Bach, because the study is looking for the effect of listening to classical music O B. The elderly, because they are what the treatment is applied to O C. The elderly that listen to Mozart, because the study is looking for an ellect of listening to Mozart O D. Anyone that does not listen to Mozart, because that is what is being varied O E. The elderly that listen to Mozart, because he is a great classical composer OF. Anyone that listens to Mozart, because the study is looking for the effect of listening to Mozart Who would he choose as the control group? Select the corred answer below. O A. The elderly that do not listen to classical music, because they did not listen to music and they did not receive the tre O B. The elderly that listen to Bach, because they listened to music but did not receive the treatment O C. The elderly that do not listen to Mozart, because they did not receive the treatment O D. Anyone that does not listen to Mozart, because they did not receive the treatment O E. Anyone that listens to Beethoven, because they listened to music but did not receive the treatment Would he design the experiment to be single-blind, double-blind, or neither? Select the correct answer below. O A. Neither, because the experimenter must know what music to play and the subject will hear what is played O B. Double-blind, because it is always better to have more blinding O C. Single-blind, because it can’t be double blind as the subject will hear what is played ) D. Double-blind, because the researcher or the subject knowing about the experiment wil affect the results O E. Single-blind, because the experimenter must know what music to play OF. Neither. because it can’t be single- or double-blind

None of the answers im getting are any of these.

Question None of the answers im getting are any of these. Please help ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-25 at 11.04.57 AM.png Here are the calorie distributions for a sample of Child and Adult cereals. Approximate the standard deviation of the distribution of calories in Child cereals. Child count 10 – 0 – 50 60 70 80 90 100 110 120 130 140 150 160 Calories Adult count 10 – 0 000 090000 00606006060600 0606000 8 8 50 60 70 80 90 100 110 120 130 140 150 160 Calories O 0.75 6.5 13.5

1. Consider the data in the numeric vectorx <- c(83,

Question 1. Consider the data in the numeric vectorx <- c(83, 84, 24, 69, 74, 13, 66, 97, 45, 64).Executing quantile(x) gives the output## 0%  25% 50% 75%  100%## 13.00 49.75 67.50 80.75 97.00What does the value of 67.50 represents?The mean of the dataThe 25th percentile of the dataThe standard deviation of the dataThe median of the dataThe 75th percentile of the data2. Consider the original EPIDURAL DATA in PASWR2 package. One observation has missing `oc` value. The doctor who performed the procedure at the time is:Doctor ADoctor BDoctor CDoctor D3. If we use the date EPIDURAL data from exercise 1 (this is after we dropped an observation with NA entry, the value ofEPIDURAL$kg[3] is:38672634. In R the function `plot(x, y)` produces a scatterplot, for two numeric variables, x and y?TrueFalse5. R function to make a quantile-quantile plot is `qqplot(x, y)`?TrueFalse

I have a question about some research I’m trying to

Question I have a question about some research I’m trying to conduct. There is a training program implemented by the airlines in the 1980’s that claims to help lower aircraft accidents called Crew Resource Management. I’m comparing the airline accidents and incidents in the 1970’s to those in the 1990’s to see if they went down in the 90’s and determine if this Crew Resource Management training was helpful. How would I set this up to run a Chi-square test of independence to look at the association of this? Please give me a step by step breakdown of how I would would go about conducting this chi-square test.

Please answer the following question. Round your answer to at

Question Please answer the following question. Round your answer to at least three decimal places. ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-25 at 3.12.12 PM.png Use the calculator provided to solve the following problems. . Consider a t distribution with 11 degrees of freedom. Compute P (t2 -1.02). Round your answer to at least three decimal places. . Consider a t distribution with 12 degrees of freedom. Find the value of c such that P (-c

Question:Part 1 – CONCEPTS from this week’s assigned readings and

Question Question:Part 1 – CONCEPTS from this week’s assigned readings and presentations 2 pts each = 16 ptsA researcher wants to investigate whether mindfulness training improves ability for employees to notice positive experiences in the workplace, and if this differs by gender and/or disposition. Employees were randomly assigned to one of two groups: no training or a half-day session. Gender was categorized as male or female. Disposition was categorized as follows: optimist, pessimist or realist.Ability to notice positive experiences in the workplace was quantified using a Likert-based ambulatory assessment. A factorial design was used to analyze the data. 1. How many factors are there? Answer: 2. What is the factorial notation for this design? Answer: 3. If there is a main effect of Disposition, would Tukey’s HSD need to be calculated? Why or why not? Answer: 4. What is the dependent variable? Answer: 5. How many conditions (cells) are there in the scenario? Answer: 6. How many null hypotheses (and thus, F-ratios) are there in this scenario?  Answer: Use one of the following key terms to answer each of the following questions. KEY TERM BANK (separated by commas): Univariate, Multivariate, meta-analysis, F-ratio, interaction, main effect7. Use this type of statistics to analyze data when you have more than one dependent variable.  Answer: 8. This describes the effect of a single variable as if there were no other variables in the study.  Answer: 

Use the topic:The Golden Gate Warriors Points Per Game in

Question Use the topic:The Golden Gate Warriors Points Per Game in 2016 (use the points scored in the first 50 games).Round all values to 2 decimal places when appropriate.

A B Total1 16 34 502 34 41 75Total 50

Question A B Total1 16 34 502 34 41 75Total 50 75 125 />a. Find the expected frequency for each cell. A B Total1 502 75Total 50 75 125

_ A B C Total1 15 30 45 902 40

Question _ A B C Total1 15 30 45 902 40 50 60 150B. Compute x2STAT x2STAT = ____

a. Find the expected frequency for each cell.ABTotal12020303050502303045457575Total50507575125125​(Type integers or​

Question a. Find the expected frequency for each cell.ABTotal12020303050502303045457575Total50507575125125​(Type integers or​ decimals.)b. Compare the observed and expected frequencies for each cell.The totals for the observed and expected frequencies are the same. C. compute χ2STAT. Is it significant at α=0.05​?First let π1 be the proportion of all events of interest in​ A, and let π2 be the proportion of all events of interest in Upper H 0 : pi 1 equals pi 2H0: π1=π2Upper H 1 : pi 1 not equals pi 2H1: π1≠π2Calculate the test statistic. x2STAT =

For study purposes please explain.. ATTACHMENT PREVIEW Download attachment CH

Question For study purposes please explain.. ATTACHMENT PREVIEW Download attachment CH 8.jpg Homework: Week 1 Homework (Chapters 1

Pick a DataSet and download the PDF document and make

Question Pick a DataSet and download the PDF document and make note of the volume, number, and date. For example you could use the National Vital Statistics Reports,Pick the same month/year combination for each data set. For example, choosing September of 2009.set up a summary table for 1. Live Births, 2. Deaths, 3. Marriages, and 4. Divorces highlighting the mean, median, sample standard deviation, minimum and maximum values for each the data sets. You will have FOURtables using the list of values of each state, the District of Columbia and Puerto Rico (You will have 52 numbers for each data set).Summary Table for _________Mean Median Standard Deviation Minimum Maximum.Hypothesis TestingWith the information that is gather from the summary tables, test the following ( use excel when appropriate):Determine if there is sufficient evidence to conclude the average amount of births is over 5000 in the United States and territories at the 0.05 level of significance.Determine if there is sufficient evidence to conclude the average amount of deaths is equal to 6000 in the United States and territories at the 0.10 level of significance.Determine if there is sufficient evidence to conclude the average amount of marriages is greater or equal to 2500 in the United States and territories at the .05 level of significance.Determine if there is sufficient evidence to conclude the average amount of divorces is less than or equal to 4000 in the United States and territories at the 0.10 level of significance.For each of the tests above, , be sure to—

_ A B C Total1 15 30 45 902 40

Question _ A B C Total1 15 30 45 902 40 50 60 150B.Find the p-value />p-value ___

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