OPENINTRO:STATISTICS
OPENINTRO:STATISTICS
4th Edition
ISBN: 9781943450077
Author: OPENINTRO
Publisher: amazon.com
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Chapter 1.1, Problem 1E

a.

To determine

Find the percentage of treatment group patients who are pain free.

b.

To determine

Find the percentage of control group patients who are pain free.

c.

To determine

Identify which group has more percent of pain free patients.

d.

To determine

Find another possible explanation for the observed difference between the percentages of patients which are pain free 24 hours after receiving acupuncture in the two groups.

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Please help me with the following statistic question
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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