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Batch 7 - May I please get help/guidance with the following homework question? Thank you for your help. Q23 : Computer Services, Inc. wants to

Batch 7 - May I please get help/guidance with the following homework question? Thank you for your help.

Q23:

Computer Services, Inc. wants to determine a confidence interval for the average CPU time of their teleprocessing transactions. A sample of 34 transactions yielded a mean of 4 seconds with a standard deviation of 0.9 seconds.

a. What is the Margin of Error (MOE) if a 95% confidence interval is desired?

b. What is a 95% confidence interval (CI) estimate for the mean CPU times?

c.How large the sample must be in order to obtain 97% confidence interval with margin of error equal to .2 second.

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