a list of single students from the Records Office who lve in the BYU dorms. From

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a list of single students from the Records Office who lve in the BYU dorms. From this list, 50 are randomly recorded. The wants to know the average dating expenses for BYU single students. The researcher selected. The 50 students are contacted byphone and the amount they spent on average dating expense of the 50 students is $35 with a standard deviation of dates are $8. What is the population of interest? A) Average dating expenses of students recorded. The The 50 students selected. C) AIBYU single students. D) The mumber of single students who spends between $20 to $50 on date. 24. Iorder to assess opinions of BYU single students about the stated curfew regutation, a random sample of sYU single students wene selected from each Singles Ward in BYU. What type of sample is this? Statified random sample Simple random Sample C) E) Randomized Block Design 25. Two classes, one with 15 students and the other with 25 students, took the same test and averaged 85 points and 75 points, respectively. If the two classes were combined, the overall average score of the 40 students would be 80 points A) True B) False 26. Same researchers have proposed a new treatment for Alzheimer's disease. They propose to divide their subjects into two groups; one group gets this new treatment, while the other group gets the treatment.At the end of the study, the quality of life ofall the subjects is assessed What would you say about this study design? A) the researchers didn't need to have a group of subjects receliving the standard treatment. They could have abtained equaily goad results with ralf the number of subjects B) the researchers could have used available data C) this is a case where a comparative experiment is D) it enables the researchers to see whether the new treatment has more than a placebo effect El not necessary there is likely to be a nonresponse bias 27. Some investors beliteve in a "January Indicator for the stock market that is, if the stock market is in January, it will be up for the rest of the year (and If the market is down In January, it will be down for the rest of the yearl. Historical data fron a stock market Is as fllows Rest of year Jannary Up Down 16 Down 21 23 Find the margtnal distrituto of ups and downs for January. Whatts the proportion of Times the stock market went up?

Explanation / Answer

(23)A researcher wants to know the average dating expenses for BYU single students. The researcher obtained a list of single students from the Records Office who live in the BYU dorms. From this list , 50 students are randomly selected. The 50 students are contacted by phone and the amount they spent on dates are recorded. The average dating expense of the 50 students is $35 with a standard deviation of $8. What is the population of interest?
Ans:All BYU single student (option C is correct)

(24)Inorder to asses opinions of BYU single students about the stated curfew regulation a random sampl eof BYU single students were selected from each singles ward in BYU what type of sample is this
Ans:Stratified random sample (option B is correct)

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