Question

1. For a normal curve whose mean is 5 with a standard deviation of 1.1 find the x-value with 73% of the data to the left of it.

1. 5 %.67 b) 0.61 C) 0.73 d) answer not here

2. The marks on a statistic test are normally distributed with a mean of 62 and a standard deviation of 15. If the instructor wishes to assign B's or higher to the top 30% of the students in the class, what mark is required to get a B or higher? You must get a 69.8 to get a B or higher.

True

False

3. Find the area under the normal distribution curve to the right of z = –0.65.

A.74%B.24%C.26%D.– 24%

4. Given the normal distribution curve shown in the figure below, find the area under the curve between z = 0 and z = 2.16

A.48.21%B.48.46%C.47.88%D.49.55%

5. Find the probability P(z < 0.17) using the standard normal distribution.(Remember probability is the same thing as the area for the normal curve.)

A..5675B..0675C..4325D..8300

6. Find the area under the normal distribution curve between z = –0.85 and z = 1.95

A.30% B.47% C.17% D.78%

7. Find the probability P(–0.62 < z < –0.01) using the standard normal distribution.

A..7716 B..3584 C..2284 D..1900

8. For a normal curve whose mean is 2.1 with a standard deviation of 0.5 find the area underneath the curve with x less than 2.2.

A)58% B.42% C.2.2% D.Answer not here

9. For a normal curve whose mean is 5 with a standard deviation of 1.1 find the x-value with 73% of the data to the left of it.

a) 5.67 B..61 C..73 D.Answer not here

Answer 1