MATH 399N Week 5 Homework Solutions: → Spring 2017
Q. Assume the random variable x is normally distributed with mean μ=82 and standard deviation σ=5.
Find the indicated probability.
Q. Find the probability that a study participant has a height that is less than 65 inches
Q. Find the probability that a study participant has a height that is between 65 and 71 inches.
Q. Find the probability that a study participant has a height that is more than 71 inches.
Q. What % of the SAT verbal scores are less than 675
Q. If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 525?
Q. The probability that the mean salary of the sample is less than $59,000 is?
Q. Assuming the manufacturer's claim is correct, what is the probability that the mean of the sample is 50,802 miles or less?
Q. what do you think of the manufactures claims, based off of the previous question?
Q. Would it be unusual to have an individual tire with a life span of 50,802 miles? Why or why not?