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Category > Math Posted 30 Sep 2017 My Price 7.00

Question 5 A personnel director at a very large corporation wants to see if her administrative assistants can type faster

Question 5

A personnel director at a very large corporation wants to see if her administrative assistants can type faster (i.e., more words per minute) than the national average of 50 words per minute. She tests 60 of her administrative assistants and finds their average words per minute is 50.5 with a standard deviation of 4.5. Using a 0.05 significance level, the personnel director finds the following:

H1: µ > 50

zα: 1.65

z = 0.861

Based on this information, what would you conclude?

a.Fail to reject the null hypothesis

b.Reject the null hypothesis

 

 

6)

The average number of prior incarcerations an inmat has is approximately 1.5. We are working with a sample of serious offenders from Illinois. We've surveyed 100 inmates and found that their average number of prior incarcerations is 2.76 with a standard deviation of 1.43. Perform a hypothesis test to determine if our sample's average is truly different from the population average. Use an alpha level of 0.01.

 

Are you using a one or two-tailed test?

Two-tailed test

One-tailed test

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Status NEW Posted 30 Sep 2017 03:09 AM My Price 7.00

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