Google Answers: business statistics

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Q: business statistics ( No Answer, 1 Comment )

Question

Subject: business statistics
Category: Business and Money
Asked by: sambrew-ga
List Price: $3.00

Posted: 20 Jun 2005 16:49 PDT
Expires: 20 Jul 2005 16:49 PDT
Question ID: 535256

A large plumbing repair firm interested in  knowing the mean time
spent on residential service calls by its plumber. A random sample of
49 records reveals a mean tiem of 180 minutes with the standard
deviation of 35 minutes Is sample size large enough for 5 minute
percision at 95% confidence level? explain your work.

Answer

There is no answer at this time.

Comments

Subject: Re: business statistics
From: ed130-ga on 30 Jun 2005 18:38 PDT

n = (1.96*35)/5 = 14. so the sample size is large enough.

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