Question

a)Use a normal approximation to find the probability of the indicated number of voters. In this​ case, assume that 111 eligible voters aged​ 18-24 are randomly selected. Suppose a previous study showed that among eligible voters aged​ 18-24, 22% of them voted.Probability that fewer than 29 voted.

The probability that fewer than 29 of 111 eligible voters voted is ___ Round to 4 decimal points.

b)If np ≥5 and nq ≥​5, estimate P(at least 8) with n equals=13 and p equals=0.4 by using the normal distribution as an approximation to the binomial​ distribution; if np less than<5 or nq less than<​5, then state that the normal approximation is not suitable.

Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.

P(at least 8)= ____

P)

Answer 1

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