Textbook ExpertVerified Tutor
18 Dec 2021
Given information
For kids in a school, the standard deviation of heights is .
The sample size is , and the sample's standard deviation of heights is .
But the researcher believes that the standard deviation for school is greater than .
Step-by-step explanation
Step 1.
Know that is the number of degrees of freedom. The following equation can be used to compute it.
where the total number of the data
Observe that in this question the sample size is .
Therefore,
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