Time spent usingâ e-mail per session is normallyâ distributed, with mu equals 10μ=10 minutes and sigma equals 3Ï=3 minutes. assume that the time spent per session is normally distributed. complete partsâ (a) throughâ (d).
a. if you select a random sample of 5050 âsessions, what is the probability that the sample mean is between 9.89.8 and 10.210.2 âminutes?
