Assignment:
The percentage of people (to the nearest 10) responding to an advertisement is a random variable with the following probability distribution:
| x |
P(x) |
| 0 |
0.1 |
| 10 |
0.2 |
| 20 |
0.35 |
| 30 |
0.2 |
| 40 |
0.1 |
| 50 |
0.05 |
a. Show that P(x) is a probability distribution.
b. Find the cumulative distribution function.
c. Find the probability that more than 20% will respond to the ad.
Your answer must be typed, double-spaced, Times New Roman font (size 12), one-inch margins on all sides, APA format and also include references.