The state value of the test statistic and determine whether the null hypothesis will retain or reject. On a 100-point scale of physical endurance, a police officer population at the local station scored 72 on the physical fitness scale. Consider the following scenario: the police chief selects a randomly selected sample of 49 police officers from this population and records this sample's mean physical fitness rating of 74. A .05 level of significance is used to determine if physical endurance increased by using a one-sample z test.

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Chapter 7, Problem 22CAP

(a)

To determine

To Explain: The state value of the test statistic and determine whether the null hypothesis will retain or reject. On a 100-point scale of physical endurance, a police officer population at the local station scored 72 on the physical fitness scale. Consider the following scenario: the police chief selects a randomly selected sample of 49 police officers from this population and records this sample's mean physical fitness rating of 74. A .05 level of significance is used to determine if physical endurance increased by using a one-sample z test.

(b)

To determine

The effect size by suing Cohen's d. On a 100-point scale of physical endurance, a police officer population at the local station scored 72 on the physical fitness scale. Consider the following scenario: the police chief selects a randomly selected sample of 49 police officers from this population and records this sample's mean physical fitness rating of 74. A .05 level of significance is used to determine if physical endurance increased by using a one-sample z test.

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