Question 1 out of 4.

A standard normal distribution has:

  1. a mean of 1 and a standard deviation of 1
  2. a mean of 0 and a standard deviation of 1
  3. a mean larger than its standard deviation
  4. all scores within one standard deviation of the mean
Question 2 out of 4.

A number 1.5 standard deviations below the mean has a z score of:

  1. 1.5
  2. -1.5
  3. 3
  4. more information is needed
Question 3 out of 4.

A distribution has a mean of 16 and a standard deviation of 6. What is the Z score that corresponds with 25?

Question 4 out of 4.

A distribution has a mean of 18 and a standard deviation of 5. Use the table presented in this section to determine the proportion of the scores (area) below 6.