An auto insurance company is concerned that body shop A charges more for repair work than body shop B charges. It plans to send 20 cars to each body shop and obtain separate estimates for the repairs needed for each car. How can the company do this and obtain independent samples? Explain in detail.
Q. 2The 10th percentile of a set of measurements is the value which exceeds 90 of the measurements and is less than the remaining 10 of the measurements.
Indicate whether the statement is true or false
Q. 3An experiment is designed to study the effect diet has on the uric acid level. Thirty people are used for the study. Fifteen are randomly selected and given a junk-food diet. The other fifteen received a high-fiber, low-fat diet. Uric acid levels of the two groups are determined. Do the resulting sets of data represent dependent or independent samples? Explain.
Q. 4Any unusually large observation (as measured by a z-score greater than 3), or any unusually small observation (as measured by a z-score smaller than -3) is considered an outlier.
Indicate whether the statement is true or false
Q. 5Twenty people were selected to participate in a psychology experiment. They answered a short multiple-choice quiz about their attitudes on abortion and then viewed a 50-minute film. The following day the same 20 people were asked to answer a follow-up questionnaire about their attitudes. At the completion of the experiment, the experimenter will have two sets of scores. Do these two samples represent dependent or independent samples? Explain.
Q. 6z-scores exceeding 3 in absolute value are likely to occur.
Indicate whether the statement is true or false
Q. 7Describe how one could select two independent samples from among his/her co-workers to compare the salaries of female and male workers.
Q. 8Incomes of workers in an automobile company in Michigan are known to be right - skewed with a mean equal to 36,100 . If at least 8/9 of all incomes are in the range of 29,600 to 42,800, and this was based on Tchebysheff's Theorem, what is the standard deviation for the auto workers?
a. 6,500
b. 6,700
c. Approximately 4,755
d. 2,200
e. 2,600
Q. 9Explain why studies involving identical twins result in dependent samples of data.
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