Question

1. Scores on an endurance test for cardiac patients are normally distributed with a mean of 182 and a standard deviation of 24. What is the probability that a patient has a score below 190?

0.1306

0.6306

0.7487

0.3544

2. An electrical component is designed to provide a mean service life of 3000 hours with a standard deviation of 800 hours. The service life of the component is known to fillow a normal distribution. Batches of size 50 are taken. What is the probability that the mean life for a batch is more than 2900 hours?

0.7111

0.8116

0.6884

0.5116

3. Scores on an endurance test for cardiac patients are normally distributed with a mean of 182 and a standard deviation of 24.What is the probability that a patient has a score above 182?

0.25

0.75

0.7299

0.50

4.

The number of interviews received within a month by TSU business graduates is normally distributed with a mean of 8 interviews and a standard deviation of 2 interviews. 90% of all graduates receive less that how many interviews?

11.04

10.56

12.61

9.13

Answer 1