Based on data from a car bumper stickerstudy, when a car is randomlyselected, the number of bumper stickers and the corresponding probabilities are as shown below.

Complete parts(a) through(d).

x P(x)

0 0.814

1 0.071

2 0.047

3 0.017

4 0.015

5 0.011

6 0.009

7 0.006

8 0.006

9 0.004

a. Does the given information describe a probabilitydistribution?

Yes

No

b. Assuming that a probability distribution isdescribed, find its mean and standard deviation.

The mean is =____

. (Round to the nearest tenth asneeded.)

The standard deviation is =__

. (Round to the nearest tenth asneeded.)

c. Use the range rule of thumb to identify the range of values for usual numbers of bumper stickers.

The maximum usual value is ____

. (Round to the nearest tenth asneeded.)

The minimum usual value is ___

. (Round to the nearest tenth asneeded.)