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Question 1: The standard error of the mean must equal:
a) the standard deviation of the sample's distribution of individual scores
b) the standard deviation of the entire population's distribution of individual scores
c) the "average" of the sample's distribution of individual scores and the population's distribution of individual scores
d) the standard deviation of the entire sampling distribution of means
Question 2: One measure of the overall sampling error in the entire distribution of sample means is the:
a) standard error of the mean
b) population mean
c) population median
d) sample's true amount of bias
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
Find out the operating characteristics for this system.
Find the probability that exactly 15 flights arrive on time.
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
Caselet on McDonald’s vs. Burger King - Waiting time
Assume that the measurements came from a normal distribution. The variability of the manufacturing process is unknown means the same as the standard deviation is unknown.
The mean maximum oxygen uptake for elite athletes has been found to be 80 with a standard deviation of 8.1. Assume that the distribution is approximately normal.
To test the given claim using Single Proportion Z test.
Looking at the data, the manufacturer is incorrect in its label claim. Perform hypothesis testing to prove or disprove it. Is the manufacturer correct in its label claim? Explain.
Find a 98% confidence interval for the mean number of days required for successful completion of physical therapy for patients in the average group. Discuss the results.
Use normal approximation to determine probability that x = 2. Illustrate all work.
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