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A study of 90 workers following a new pre-work stretching exercise program was conducted. One of...

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Statistics

A study of 90 workers following a new pre-workstretching exercise program was conducted. One of the variablesmeasured over the 4-week study was the increase in number ofminutes worked in an hour. A previous program had produced anaverage increase of µ = 2 mins per hour. The company wants toevaluate whether the new program had increased µ incomparison
with the previous program. The study data yielded xÌ…= 2.17 and s =1.05.

a. At the 5 percent level of significance, compare the new programto the previous one.

b. What is the probability of making a Type II error if the actualvalue of µ is 2.1 min per
hour?

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