The lengths of pregnancies in a small rural village are normally distributed with a mean of 266 days and a standard deviation of 17 days. In what range would you expect to find the middle 68% of most pregnancies? Between and If you were to draw samples of size 52 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places.

This histogram shows the heights of 20 students in a statistics class. Explain why it is not appropriate to find summary statistics for this distribution. Frequency 4- 3- 2- 1- T 0+ 60 65 70 75 Height (Inches) Choose the correct answer below. OA. Since there appear to be two modes, this data probably represents men and women and should be split into those two groups before finding any summary statistics. OB. The number of data values is too small for summary statistics to be meaningful. OC. Since the data appear to be bimodal, no other measures of center or spread can be calculated. OD. Since the distribution is not symmetric, summary statistics would be meaningless.

If the mean of a data set is 22 and the SD is 5, what % of the values fall between 12 and 27? Give a 2-decimal

You are considering taking two professors for a statistics course.  Both professors have an average of 65%.  The first professor has a standard deviation of 1%.  The second professor has a standard deviation of 15%.  Which professor do you have a better chance of passing with?