Question

You are performing a study about the weight of preschoolers. A previous study found the weights to be normally distributed with a mean of 30 and a standard deviation of 4. You randomly sample 30 preschool children and find their weights to be as follows. 25 25 25 26 27 27 27 28.5 28.5 28.5 29 29 30 30 30 31 31 32 32.5 32.5 33 33 34 34.5 35 35 37 37 38 38 a) Find the mean and standard deviation of your sample. b) Is there a high probability that the mean and standard deviation of your sample are consistent with those found in previous studies? Explain your reasoning.

Answer 1