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In 2010, the average age of students at UTC was 22 with a standard deviation of 3.96. In 2013, the average age was 24 with a standard deviation of 4.08. In which year do the ages show a more dispersed distribution? Show your complete work and support your answer.
Determine the probability that of a Type I error using decision rule if population mean is in fact 800 kilowatts per day?
The 99% confidence interval estimating the proportion of all students at the university who prefer outdoor exercise is given by which of the following?
Use RNG in Excel to generate n = 5 observations from the Normal distribution N(20, 5). Test H0: μ = 20 versus H0: μ ≠ 20 at the α = 0.05 level of significance. Repeat this process 100 times and then count the number of times that you reject H0.
Compute the value of t. What is your decision regarding the null hypothesis? Briefly summarize your results.
At.05 significance level, can we conclude that larger proportion of the agents think the economy is expanding this month?
Which of the following assumptions for inference about a proportion using a confidence interval are violated,
Twenty three percent of automobiles are not covered by insurance. On a particular weekend, 35 automobiles are involved in accident.
What is the best prediction for the number of products sold based on advertising costs of $7000?
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Use the marginal probabilities of school quality, school cost or convenience, and other to comment on the most important reason for choosing a school.
The number of widgets produced by 9 employees in an eight hour shift is recorded as: 135, 120, 116, 119, 121, 125, 135, 131, 123. What is the median of the number of widgets produced presented above?
Which test should we use to determine whether the difference between Mesa and Tempe is statistically significant? Why? Should it be one or two-tailed?
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