Question
1- Suppose the prevalence rate of a particular trait among U.S. Adults is 50.2%. Consider taking a random sample of five U.S. Adults. Define the
1- Suppose the prevalence rate of a particular trait among U.S. Adults is 50.2%.
Consider taking a random sample of five U.S. Adults. Define the random variable of interest to be:
X = the number of individuals with the particular trait in our sample of 5 individuals.
Find P(X < 2).
| 0.815 |
| 0.154 |
| 0.496 |
| 0.185 |
2- Suppose the prevalence rate of a particular trait among U.S. Adults is 27.2%.
Consider taking a random sample of five U.S. Adults. Define the random variable of interest to be:
X = the number of individuals with the particular trait in our sample of 5 individuals.
Find P(X > 3).
| 0.128 |
| 0.02 |
| 0.001 |
| 0.021 |
3- Suppose the prevalence rate of a particular trait among U.S. Adults is 41.7%.
Consider taking a random sample of 295 U.S. Adults. Define the random variable of interest to be:
X = the number of individuals with the particular trait in our sample.
Find the standard deviation of the random variable X.
| 172 |
| 8.5 |
| 123 |
| 71.7 |
| 11.1 |
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Probability and Random Processes With Applications to Signal Processing and Communications
Authors: Scott Miller, Donald Childers
2nd edition
123869811, 978-0121726515, 121726517, 978-0130200716, 978-0123869814
