a large study involving over 20000 individuals shows that the mean percentage intake of kilocalories from fat was 39% with a range from 6%- 72%. a small sample study was conductd to determine if the mean intake of patiens was different from 39%. a sample of 15 patients had a mean intake of 40.8% with a standard deviation equal to 6.5% assume the sample is normally distributed. what evidence do we have that the assumption of normality is reasonable
