Student's Solutions Manual for Elementary Statistics: Picturing the World
Student's Solutions Manual for Elementary Statistics: Picturing the World
6th Edition
ISBN: 9780321911254
Author: Ron Larson, Betsy Farber
Publisher: PEARSON
Question
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Chapter 11.2, Problem 1TY

a.

To determine

To identify: The claim and state H0 and Ha.

b.

To determine

To identify: The level of significance.

c.

To determine

To identify: The sample size n.

d.

To determine

To find: The critical value.

e.

To determine

To find: The test statistic x.

f.

To determine

To decide: Whether to reject the null hypothesis or not.

g.

To determine

To interpret: The decision in the context of the original claim.

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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.

Chapter 11 Solutions

Student's Solutions Manual for Elementary Statistics: Picturing the World

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