document.write( "Question 330666: the amount of time customers at a quick change motor oil store spend waiting for their cars to be serviced has the normal distribution with mean u and standard deviation q= 4 minutes. it is compagny policy that the customer wait time should be 20 minutes or less. the manager of a particular store selects a random sample of 150 customer wait times and observes a mean wait time of 21 minutes.\r \n" );
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document.write( "if the manager had selected more custemers for her sample, the margin of error in the 95% confidence interval computed would:\r \n" );
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document.write( "a- become larger \n" );
document.write( "b- not change \n" );
document.write( "c- become smaller \n" );
document.write( "d- becomes larger or smaller depending on sample \n" );
document.write( "thank you very kindly \n" );
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