Question

29. Suppose it is believed that the probability a patient will die from a certain disease following treatment is 0.1. In a group of 150 such patients, the number who do not die would have mean and standard deviation_ (given to two decimal places).

Answer 1

solution

mean and standard deviation

Mean = $\mu$ = n * p = 150 * 0.1 = 15

Mean =  $\mu$ =15

Standard deviation = $\sigma$ = $\sqrt$ n * p * (1- P)= $\sqrt$ 150 *0.1 *0.9 = 3.67

Standard deviation = $\sigma$ = 3.67