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Suppose that you measure the heights of 20 high school sophomore males. The sample mean is 66.2 inches. Suppose that the heights of the population of all high school sophomore males follow a normal distribution with unknown mean and standard deviation of 4.1 inches.
a. what is a point estimate of the unknown mean height of high school sophomore males?
b. Calculate the margin of error of a 95% confidence interval of the mean.
c. Calculate a 95% confidence interval of the mean.
d. Suppose that you want a 95% confidence interval estimate of the mean with a margin of error of 1. How many students should you sample to achieve this margin of error?
what is a research question that you would like to answer? write the null and research hypotheses. would you use a one-
The mean salary, do you think introducing Michael Jordan's last annual salary of more than $30 million would skew this distribution?
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If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?
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Consider randomly selecting a student at a certain university, and let A denote the event that the selected individual has a Visa credit card and B be the analogous event for a MasterCard. Suppose that P(A) = .5, P(B) = .4, and P(A intersect B..
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