Statistics and the normal distribution

Question 1 of 10

The normal distribution curve is

Question 2 of 10

X ~ N(50, 16). Find P(X > 58) given P(Z < 2) = 0.9772.

Question 3 of 10

A score of 70 comes from a normal distribution with mean 60 and standard deviation 5. What is its z-score?

Question 4 of 10

If X ~ N(100, 225), the standard deviation is

Question 5 of 10

The scores of a test have mean 60 and SD 8. A score of 76 has a z-score of

Question 6 of 10

About 95% of a normal distribution lies within

Question 7 of 10

If X ~ N(50, 25), the standard deviation of X is

Question 8 of 10

A normal distribution curve is

Question 9 of 10

About what percentage of a normal distribution lies within one standard deviation of the mean?

Question 10 of 10

In a normal distribution, about 68% of values lie within