A 2011 survey, by the Bureau of Labor Statistics, reported that 91% of Americans have paid leave.
Question:
A 2011 survey, by the Bureau of Labor Statistics, reported that 91% of Americans have paid leave. In January 2012, a random survey of 1000 workers showed that 89% had paid leave.
The resulting p-value is .0271; thus, the null hypothesis is rejected. It is concluded that there has been a decrease in the proportion of people, who have paid leave from 2011 to January 2012.
1. What type of error is possible in this situation?
A. type I
B. type II
C. neither
D. both
2. Suppose the results indicate that the null hypothesis should be rejected; thus, it is possible that a type I error has been committed. Given the type of error made in this situation, what could researchers do to reduce the risk of this error?
A. Choose a .01 significance level, instead of a .05 significance level.
B. Increase the sample size.
3. Suppose the results indicate that the null hypothesis should not be rejected; thus, it is possible that a type II error has been committed. Given the type of error made in this situation, what could researchers do to reduce the risk of this error?
A. Choose a .01 significance level, instead of a .05 significance level.
B. Increase the sample size.
Business Statistics a decision making approach
ISBN: 978-0133021844
9th edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry