Page 250 - Probability Demystified

FINAL EXAM 239

41. A recent study found that 4 out of 10 houses were undermined. If 5
houses are selected, the probability that exactly 2 are undermined is
4
a.
25
27
b.
125
216
c.
625
8
d.
25

42. The mean of the standard normal distribution is
a. 1
b. 100
c. 0
d. Variable
43. The percent of the area under the normal distribution curve that falls
within 2 standard deviations on either side of the mean is approxi-
mately
a. 68
b. 95
c. 99.7
d. Variable
44. The total area under the standard normal distribution curve is
a. 50%
b. 65%
c. 95%
d. 100%

45. In the graph of the standard normal distribution, the values of the
horizontal axis are called

a. x values
b. y values
c. z values
d. None of the above