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It is reported that the average number of weeks an individual is unemployed is 17.5 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 17.5 weeks and that the population standard deviation is 4 weeks. Suppose you would like to select a sample of 100 unemployed individuals for a follow-up study. What is the probability that a simple random sample of 100 unemployed individuals will provide a sample mean within 1 week of the population mean?
Estimate the percentage of the population (from which this sample was taken) who would be unable to identify your product.
Presumably, the headline refers to all registered voters in the state, not just those in the samples. Considering the margin of error accompanying each poll, do you agree with the headline? Explain.
a researcher conducts a hypothesis test to evaluate the effect of a treatment. the hypothesis test produces a z-score
a kinesiologist would like to compare the left hand and right hand gripping strengths of left-handed individuals. a
Stockholders require a return of 9 percent to invest in Sailsboro's common stock. How would I compute the value of Sailsboro's common stock today.
using the experimental method had a mean of 29 minutes with a variance of 16 minutes. Use α = .10 for all tests.For a right-tail test of means (assume equal variances) the critical value is?
The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males.
If one person is chosen at random, what is the probability that person has dental cavities?
Explain how control charts help you perform the five basic activities of statistics. What hypotheses are being tested when you use control charts?
On the TV show Deal or No Deal, a contestant chooses from among 26 suitcases, each containing a dollar amount. These dollar amounts are: (a) Using only the table, determine the median prize amount.
What is the importance of creating your own data types? What are the benefits and drawbacks from developing your own data types?
Give a 90% confidence interval for the mean spending of customers receiving the promotion.
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