# Question

Let x be a continuous random variable that is normally distributed with a mean of 65 and a standard deviation of 15. Find the probability that x assumes a value

a. Less than 45

b. Greater than 79

c. Greater than 54

d. Less than 70

a. Less than 45

b. Greater than 79

c. Greater than 54

d. Less than 70

## Answer to relevant Questions

Let x denote the time taken to run a road race. Suppose x is approximately normally distributed with a mean of 190 minutes and a standard deviation of 21 minutes. If one runner is selected at random, what is the probability ...A construction zone on a highway has a posted speed limit of 40 miles per hour. The speeds of vehicles passing through this construction zone are normally distributed with a mean of 46 miles per hour and a standard deviation ...A psychologist has devised a stress test for dental patients sitting in the waiting rooms. According to this test, the stress scores (on a scale of 1 to 10) for patients waiting for root canal treatments are found to be ...Determine the value of z so that the area under the standard normal curve a. In the right tail is .0500 b. In the left tail is .0250 c. In the left tail is .0100 d. In the right tail is .0050 A machine at Keats Corporation fills 64-ounce detergent jugs. The machine can be adjusted to pour, on average, any amount of detergent into these jugs. However, the machine does not pour exactly the same amount of detergent ...Post your question

0