Question

The prevalence of a trait is 76%. How many would you expect to see with this characteristic in a simple random sample of n=10?​

Answer 1

Answer:

Step 1 of 3

According to the provided details, the prevalence of a trait is 76.8%

(a)

In order to find individuals expected to exhibit this characteristics mean of the given binomial distribution of simple random sampling of 5 trials. The expected value can calculate by using the formula:



Here,  is the mean, p is the probability of success and n is the number of trials. Now substitute the values of number of trials 5 and the probability of success 0.786 in the formula. The calculations are given as below:



Answer 2

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