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A graduate student ask 500 female students if they have experienced any sexual harassment on campus. Each student is asked to estimate the frequency of these incidents as either" often," "sometimes," "rarely, " or "never." The researcher also gathers data on age and major to see if there is any connection between these varibales and frequency of sexual harassment.
A case-control study of relationship between liver cirrhosis among both non alcoholics and alcoholics. Describe whether smoking is confounder.
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
Use population distribution to determine expected juror frequencies. Test researcher's claim at a = 0.01.
The Court of Appeals erred in stating that petitioners'regression analyses were "unacceptable as evidence of discrimination", because they did not include all measurable variables thought to have an effect on salary level.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
Which combination of factors produces smallest risk of Type I error?
For each lettered part, a through c, examine the two given sets of numbers. Without doing any calculations, decide which set has the larger standard deviation and explain why. Then check by finding the standard deviation by hand .
In a survey of women in a certain country (ages 20-29), the mean height was 62.9 inches with a standard deviation of 2.81 inches.
Psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significance tests.
A certain police officer stops cars for speeding. The number of red sports cars she stops in one hour is a Poisson process with rate 4, while the number of other cars she stops is a Poisson process with rate 1.
Suppose 10 balls, numbered 1-10, are to be distributed randomly into 10 boxes. a) What is the probability all 10 balls are placed into one box? b) What is the probability that no boxes are empty?
The populations must all be normally distributed, what is meant by normally distributed?
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