Students across the U.S. take the ACT test, which has scores that are normally distributed with a mean of 21 with a standard deviation of 5. If 250 students are randomly selected, what is the probability that at least 15 of them will score a 29 or better?

A small college has an entering freshmen class of 600 students. Of these, 240 have brought their own personal computers to campus. A random sample of 110 entering freshmen was taken. What is the probability that the sample proportion of freshman students who brought their own personal computers to campus is between .42 and .46?

Answer rating: 100% (QA)

To solve these probability problems we can use the normal distribution and the properties of the sample mean and sample proportion a Probability of at ... View the full answer