College

Use the Empirical Rule to answer the following questions:

a. The mean is ______.
b. The standard deviation is ______.
c. _____% of the test scores are between 58 and 66.
d. _____% of the test scores are between 54 and 70.
e. _____% of the test scores are between 50 and 74.
f. _____% of the test scores are between 62 and 66.
g. _____% of the test scores are less than 62.
h. _____% of the test scores are less than 66.

Fill in the blanks and check your answers.

Answer :

a. Mean = (50+54+58+66+70+74+62)/ 7 = 62

b. Standard deviation is

c. Between 58 and 66 , are 68.3%

d. Between 54 and 70, are 34%

e. Between 62 and 66, Is 34%

f.