BIOSTAT SPRING 2018 236281 PICK Homework: HmWrk-13 Score: 0 of 5 pts 5.2.24-T Ma

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BIOSTAT SPRING 2018 236281 PICK Homework: HmWrk-13 Score: 0 of 5 pts 5.2.24-T Mary Castellon 1 2/16/18 9:13 AM Save 80116(11 complete) HW Score: 26.83%, 33 of 123 pts - Question Help * Assume that when an adut s randomly selected the probability that they do not ro quire vrsion correction s 19%. If 9 adults are randomi that fewer than 3 of them do not require a vision corection selected fi d the probab ity If 9 adults are randomly selected the probability that fewer than 3 of them do not requre avsl n correction s (Round to three decimal places as needed) Enter your answer in the answer box and then click Check Answer. Clear All

Explanation / Answer

n = 9

p = 0.19

P(X = x) = nCx * px * (1 - p)n - x

P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)

               = 9C0 * (0.19)^0 * (0.81)^9 + 9C1 * (0.19)^1 * (0.81)^8 + 9C2 * (0.19)^2 * (0.81)^7

               = 0.764

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