The probability distribution of X is X P(X) 3 1/20 4 2/20 5 11/20 6 6/20 What is the expected value of X?

Select one:

a.5.00

b.4.78

c.4.60

d.4.80

e.5.10

Find z when the area to the right of z is .05.

a.1.12

b..55

c.1.12

d..55

e.1.64

The manager of a grocery store wants to determine whether the amount of water contained in a 1L bottle purchased from a known manufacturer actually averages to 1L. It is known from the manufacturer's specifications that the standard deviation of the amount of water is equal to 0.02L. A random sample of 36 bottles is selected, and the mean amount of water per 1L bottle is found to be 0.991 L. The p-value is _____.

a..2246

b..0893

c..0069

d..1456

e..0083