Sign up for FREE

PS.9

Last updated over 4 years ago

5 questions

1

Question 1

1.

A set of test scores are normally distributed with a mean of 300 and a standard deviation of 18. What percent of the scores are between 264 and 300?

1

1

1

1

Question 2

2.

A set of test scores are normally distributed with a mean of 300 and a standard deviation of 18. What percent of the scores are greater than 318?

Question 3

3.

The weights of hammers produced in a factory have a mean of 12.2 ounces and a standard deviation 0.08 ounces.

A randomly selected hammer weighs 12 ounces. How many standard deviations is this below the mean?

Question 4

4.

The weights of hammers produced in a factory have a mean of 12.2 ounces and a standard deviation 0.08 ounces.

A randomly selected hammer weighs 12.3 ounces. How many standard deviations is this above the mean?

Question 5

5.

Student A received a score of 445 on a test where the scores are normally distributed with a mean of 450 and a standard deviation of 12. Student B received a score of 170 on a test where the scores are normally distributed with a mean of 175 and a standard deviation of 15. Which student scored better compared to the rest of their
class?

Student A

Student B

Both

Neither

Not enough information