5. pg 416 Lefties Eleven percent of students at a large high school are left-handed. A statistics teacher selects a random sample of 100 students and records X = the number of left-handed students in the sam- ple. Is the probability distribution of X approxi- mately normal? Justify your answer. 11. Normal lefties Refer to Exercise 5. P9 417 (a) Calculate the mean and standard deviation of the appropriate normal distribution. (b) Use this normal distribution to calculate the prob- ability that at least 15 of the students in the sample are left-handed