1- In a normal distribution, changing the standard deviation: Ch 6 pg 300
A.makes the curve more robust
B.shifts the curve left or right
C.splits the distribution to two curves
D.makes the curve more or less spread out
2- The standard deviation of a probability distribution is a:
A.measure of central location
B.measure of skewness of the distribution
C.measure of relative likelihood
D.measure of variability of the distribution
3- WhWhat probability value would be needed to complete the following probability distribution?
X -2 -1 0 1 2
P(X) 0.13 0.14 ___ 0.16 0.29