The distribution of scores on a test is mound-shaped and symmetric with a mean score of 78. If 68% of the scores fall between 72 and 84, which is most likely to be the standard deviation of the distribution?

The standard deviation for the distribution of scores is 6.    

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 78

We are given that the distribution of score is a bell shaped distribution that is a normal distribution.

Empirical Formula:

68% of the scores fall between 72 and 84, thus, we can write:

Thus, the standard deviation for the distribution of scores is 6.

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e