5 Normal Probability Distributions ility Distributions 38. Milk Consumption . You are performing a study about weekly per capita milk consumption. A previous study found weekly per capita milk consumption to be normally distributed, with a mean of 48.7 fluid ounces and a standard deviation of 8.6 fluid ounces. You randomly sample 30 people and record the weekly milk consumptions shown below. 40 45 54 41 43 31 47 30 33 37 48 57 52 45 38 65 25 39 53 51 58 52 40 46 44 48 61 47 49 57 (a) Draw a frequency histogram to display these data. Use seven classes. Do the consumptions appear to be normally distributed? Explain. (b) Find the mean and standard deviation of your sample. (c) Compare