C.Neither
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In case-crossover studies, all fixed individual characteristics that might confound the association of interest are controlled for.
A. True
B. False
C.Neither
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- 5) A random sample of eight drivers insured with a company and having similar auto insurance policies was selected. The following table lists their driving experiences (in years) and monthly auto insurance premiums. Driving Experience (years) Monthly Auto Insurance Premium 5 $64 2 87 12 50 9 71 15 44 6 56 25 42 16 60 Does the insurance premium depend on the driving experience or does the driving experience depend on the insurance premium? Do you expect a positive or a negative relationship between these two variables?The chi-square test tells us:a. Whether there is a relationship or associationb. Effect size (how small or large the association is)c. Both a and bd. None of the above 6. The chi-square test requires that thea. Frequencies represent independent counts (not ranks or percentages)b. Categories are mutually exclusive and exhaustive, i.e., that is every subject canbe assigned to only one appropriate categoryc. Data are independent, i.e., repeated measures are not allowedd. All of the above 7. The following is true about the chi-square test:a. It compares observed frequencies with the expected frequenciesb. Greater the difference between the observed and the expected frequencies,greater the value of calculated chi-squarec. Degrees of freedom = (rows-) x (columns-1)d. All of the aboveA defining characteristic of the correlational study is that the ____. a.) intent is simply to describe behaviors b.) intent is to demonstrate the relationship between variables c.) research is conducted in field settings rather than in a lab
- Suppose you have a data set about whether a person received a new drug or a sugar pill and the number of hours of deep sleep. a. Which of the sources of data best describe the data set? b. Is the data set based on a sample or a population? ... a. Choose the correct answer below. O A. These data are results of an observational study. O B. These data are collected by ongoing business activities. OC. These data are outcomes of a designed experiment. O D. These data are responses from a survey. O E. These data are distributed by an organization. b. Choose the correct answer below. O A. The data was taken based on a population. O B. The data was taken based on a sample. O C. There is no way to know whether the data was taken based on a sample or a population.Which of the following predictions is true about the CAPM. A) Beta is not the only measure of risk that is priced B) There is a no linear relationship between the expected return on an asset and its risk C) The linear relationship between risk and return is positive D) All of the above E) None of the aboveSuppose a company surveyed the work preferences and attitudes of 1,006 working adults spread over three generations: baby boomers, Generation X, and millennials. In one question, individuals were asked if they would leave their current job to make more money at another job. The sample data are summarized in the following table. Leave Job for More Money? Yes No Baby Boomer 119 197 Generation Generation X 149 180 Millennial 177 184 Conduct a test of independence to determine whether interest in leaving a current job for more money is independent of employee generation. State the null and alternative hypotheses. Ho: Interest in leaving job for more money is not independent of the employee generation. H₂: Interest in leaving job for more money is independent of the employee generation. Ho: Interest in leaving job for more money is independent of the employee generation. H₂: : Interest in leaving job for more money is not independent of the employee generation. Ho: : Interest in leaving job…
- Which of the following individuals is likely to be excluded fromn a clinical trial? A. someone with other diseases other than the disease of interest for the trial B. someone whose data is considered to be an outlier C. someone who is considered to be a minority D. someone who will have difficulty complying with trial protocols1. The grades of a class of 9 students on a midterm report and on the final examination are given as follows: Midterm Examination report 77 82 50 66 71 78 72 34 81 47 94 85 96 99 99 99 67 68 a. It was claimed that the scores of the midterm report has an influence on the grade in the final examination. Validate this claim by determining if there is a linear correlation between the grades of midterm report and the final examination. b. If there is a linear correlation, based on your computation in letter (a), construct a simple linear regression model. Otherwise, disregard this question and the next question. C. Estimate the final examination grade when the midterm report is 75.1. A researcher expects that the number of people (18 years and older) who report binge drinking in the past month will be higher for Appleton WI residents as compared to the national rate, which is 25%. The researcher samples 100 residents from Appleton WI (age 18+) and finds that 36 of the 100 Appleton residents reported binge drinking in the past month. Using this data set answer the following questions: A. What is yobt? B. What is the df for this test?
- By some measures, Millennials (people ages 18-34) have very different lives than earlier generations did when they were young. Theyre slow to adopt many of the traditional markers of adulthood. For the first time in more than 130 years, young adults are more likely to be living in their parents home than in any other living arrangement. In fact, a larger share of them are living with their parents than with a romantic partner marking a significant historical shift.Assume there were 77 million (77,000,000) Millennials in 2014. According to the graphic, in 2014 how many more Millennials lived in their parent(s) home than were married or cohabitating in their own household? Note that although the numbers displayed within the graphic don't display the % sign, they are percentages.??? more Millennials lived in their parent(s)' home than were married or cohabitating in their own householdA pension fund manager is considering three mutual funds. The first is a stock fund, the second is a long-term bond fund, and the third is a money market fund that provides a safe return of 5.5%. The characteristics of the risky funds are as follows: Expected Return Standard Deviation Stock fund (S) 15% 32% Bond fund (B) 9 23 The correlation between the fund returns is .15 12.) if you were to use only the two risky funds and still require an expected return of 12% what would be the investment proportions of your portfolio? Compare its standard deviation to that of the optimal portfolio in the previous problem. What do you conclude?3. A statement is made about correlation. State whether the correlation is positive or negative and whether the correlation is most likely due to coincidence, a common underlying cause, or a direct cause. If there is an underlying cause, state what the underlying cause is. If one directly causes the other, state which is the cause and which is the effect. (a) In Angela's class, the taller students got lower scores on the test. (b) As Thomas's income rose over the last 20 years so has his stress level.
