If np ≥ 5 and nq ≥ 5, estimate P(at least 9) with n = 13 and p = 0.5 by using the normal distribution as an approximation to the binomial distribution; if np <5 or nq <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. A. P(at least 9) = (Round to three decimal places as needed.)

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