Suppose that a poll taken 10 years ago found that 69% of parents spank their chi

Question

Suppose that a poll taken 10 years ago found that 69% of parents spank their children. Suppose a recent poll of 450 adults with children finds that 281 ndicated that they spank their children. Complete parts a and b below. (a) Assuming parents' attitude toward spanking has not changed since the original poll, how many of the 450 parents surveyed would be expected to spank their children? The expected amount of parents surveyed that would spank their children is (Round to the nearest whole number as needed.)

Explanation / Answer

The expected value is calcualted as n*p where n is the number of people in the sample which is 450 and p is 0.69

thus answer is 450*0.69=310.5

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