Summative Assesment 2 Directions Solve the following A data from a school clinic shows that the mean weight of grade 9 male students is 45 kilograms with a standard deviation of 3 kilograms. A sample of 100 grade 9 male students were found to have a mean of 47 kilograms. Are the 100 grade 9 really heavier thatn the rest, using 0.05 significance level?
