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Random samples of size 2 are drawn from a finite population which consists of the numbers 2,4,6 and 8.a.) List all the possible samples that can be drawn without replacement from this population, calculate their means and, assigning each of these values with their corresponding probability, construct the sampling distribution of the mean for the random samples of size 2 from the population. Calculate the mean and the standard deviation of the sampling distribution obtained in part (a) and verifies using Central Limit Theorem.
Taking α to be 0.05, what is/are the critical values associated with testing your hypothesis?
It is impossible to get a negative value for an F -ratio.
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.
If wages were increased by $1.00, what is the expected effect on the number of complaints received per employee? How can you tell?
If you were to conduct right-tailed hypothesis test at 5% significance level, you choose the critical value this way. Assuming that the null hypothesis is true
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
Assume it is known that the distribution of purchase amounts by customers entering a popular retail store is approximately normal with mean $25 and standard deviation $8.
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
Student volunteers in a weight loss project were randomly assigned to one of three diets. After 2 months on the diets, subjects were weighed and weight loss was recorded for each person.
The woman then starts walking around the rim clockwise (as viewed from above the system) at a constant speed of 1.5 m/s relative to the Earth. With what angular speed does the turntable rotate?
Generate a 95 % confidence interval for the difference in proportions of patients who report pain relief.
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
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