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A six-sided die is rolled 30 times and the numbers 1 through 6 appear as shown in the following frequency distribution. At the .10 significance level, can we conclude that the die is fair? Show how equations were computed.
Outcome Frequency1 32 63 24 35 96 7
Determine the critical value, z0, to test the claim about the population proportion p
What is the probability that a subscriber rented a car during the past 12 month for business or personal reasons?
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each loation.
Discuss which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis.
What was the purpose of calculating a Cohen's d? When is a Cohen's d calculated? Interpret d=.90. What does it mean in this example?
What sample size would be needed for an error of ± 1.5 with 98 percent confidence? (Data are from a project by MBA student Wendy Blomquist.)
Determine the confidence level used for the given confidence interval.
The mean monthly income of the trainees of an engineering firm is $600, with a standard deviation of $100. Find the probability that an individual trainee earns less than $500 per month.
400 customers of the company and finds that 30 of them are actually not happy about the service. Set up the null and alternative hypotheses to test for the company's claim.
What can you conclude regarding the information? Who tends to order the most or least number of condiments?
There are four auto body shops in a community and all claim to promptly serve customers. To check if there is any difference in service customers are randomly selected from each repair shop and their waiting times in days are recorded.
Investigate the comparative pros and cons of the mean and the median. Find examples where the mean is more appropriate than the median and vice-versa. Discuss the locations of the mean, median and mode for a normal, left-skewed and right-skewed di..
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