Homework SourseThe scores on a certain test are normally distributed with a
The scores on a certain test are normally distributed with a mean score of 63 and a standard deviation of 2. What is the probability that a sample of 90 students will have a mean score of at least 63.2108?
0.3413
0.8413
0.1587
0.3174
| 0.3413 | ||
| 0.8413 | ||
| 0.1587 | ||
| 0.3174 |
Solution
Convert to a z using the formula:
Z = (x
