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Scores on a test have a mean of 73 and Q3 is 81. The scores have a distribution that is approximately normal. Find P90. (You will need to first find the standard deviation.)
a. 88.8
b. 88.3
c. 87.1
d. 87.6
The mean television viewing time for Americans is 15 hours per week (Money, November 2003). Assume a sample of 60 Americans is taken to further investigate viewing habits. Suppose the population standard deviation for weekly viewing time is Q = 4..
If desired confidence level is 95 percent, suitable critical value is?
Determine the most economical monthly shipping schedule. Provide a table showing the routes and total costs.
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
Binomial distribution to find out the mean also standard deviation. Variance and standard deviation of a lot of 300 calculators.
You will be graded on accuracy, completeness (addressing each point above), and effectiveness (utility, ease of reading).
Probability using discrete distribution.The probability distribution for the random variable x follows.
What is the probability that no more than two of the three are commercial successes?
The Minneapolis Tribune ran an article on gender differences in shopping behavior. When 400 women were asked to respond to the question "Where I shop is influenced by which store has a greater variety," 60% answered "Yes.
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
The owner was interested in the mean time required to service this model, and decided not to carry the model if the mean repair time appeared to be more than 40 minutes.
Determine a 95% confidence interval for proportion of all voters in favour of candidate.
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