This preview shows page 1. Sign up to view the full content.
Unformatted text preview: a random
sample of size . 3. Assess the Evidence
a. Calculate the mean and the standard deviation ̂ ̂ √ ( ) ̂ b. Calculate the test statistic c. Calculate the value.
(
)
i. Righttailed test: value
(
)
ii. Lefttailed test: value
(
) or
(
iii. Twotailed test: value
(whichever value is smaller)
4. State a Conclusion
a. Compare the value from part 3c to the given level of significance :
i. If
, then we reject
and find enough evidence to support
ii. If
, then we fail to reject
and do not find enough evidence to support ) Answers to Practice Problems – To get full credit, you would have to show all of the following information.
1. and ( .
̂ . . ̂ ( √ ̂ ) ) so the normality criteria is satisfied. . . (
)
(righttailed test)
since
, so we reject
and find enough evidence to support . Therefore, there is sufficient evidence to say
that more than 75% of people have brown hair at the 1...
View
Full
Document
This document was uploaded on 04/03/2014.
 Spring '14

Click to edit the document details