posted by julie .
Based on a random sample of 25 units of lawnmowers, the average weight is 102 lbs., and the sample standard deviation is 10 lbs. We would like to decide if there is enough evidence to establish that the average weight for the population of lawnmowers is greater than 100 lbs. Assume the population is normally distributed. What is the sample value of the test statistic?
Try a one-sample t-test (your sample size is fairly small).