document.write( "Question 620522: The manager of a grocery store wishes to look at the efficiency of his staff. He takes a random sample of 44 customers. The average length of time it took for a customer out was 164.62 minutes with a standard deviation of 34.79 minutes\r
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Algebra.Com's Answer #390198 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "The manager of a grocery store wishes to look at the efficiency of his staff.
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document.write( " He takes a random sample of 44 customers. The average length of time it took
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document.write( " for a customer out was 164.62 minutes with a standard deviation of 34.79 minutes
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document.write( "Calculate a 90% confidence interval for the true average checkout time in his market?
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document.write( "    ME = 1.645(34.79/6.633) 
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document.write( "  164.62 - ME <  < 164.62 + ME \n" );
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