Gen Combo Ll Statistical Techniques In Business And Economics; Connect Ac
Gen Combo Ll Statistical Techniques In Business And Economics; Connect Ac
17th Edition
ISBN: 9781260149623
Author: Lind
Publisher: MCG
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Chapter 8, Problem 45CE

a.

To determine

Find the standard error of the mean for the given experiment.

b.

To determine

Find the probability that the sample mean is between 6 and 7 pairs of sports shoes.

c.

To determine

Find the probability that the difference between the sample mean and the population mean is less than 0.25 pair.

d.

To determine

Find the likelihood the sample mean is greater than 7 pairs.

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To  evaluate  the  success  of  a  1-year  experimental  program  designed  to  increase  the  mathematical achievement of underprivileged high school seniors, a random sample of participants in the program will be selected and their mathematics scores will be compared with the previous year’s  statewide  average  of  525  for  underprivileged  seniors.  The  researchers  want  to  determine  whether the experimental program has increased the mean achievement level over the previous year’s statewide average. If alpha=.05, what sample size is needed to have a probability of Type II error of at most .025 if the actual mean is increased to 550? From previous results, sigma=80.
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