1. Runzheimer International publishes results of studies on overseas business travel costs. Suppose as part of one of these studies the following per diem travel accounts (in dollars) are obtained for 14 business travellers staying in Johannesburg, South Africa. Use these data to construct a 98% confidence interval to estimate the average per diem expense for business people travelling to Johannesburg. Assume per diem rates for any locale are approximately normally distributed. What is the higher value of the confidence interval?

$142.59	$148.48	$159.63	$171.93	$146.90	$168.87	$141.94
159.09	156.32	142.49	129.28	151.56	132.87	178.34