m Open Wellum HMAC 03359d95 0163105babSaece 10013 EMENTARY STATISTICS O a test-A
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m Open Wellum HMAC 03359d95 0163105babSaece 10013 EMENTARY STATISTICS O a test-Anthony Mejia Google Chrome Take ts https//www.mathxl.com/Student/Player aspx?testid ¢enwin; yes Test MAT 120 ELEMENTARY STATISTICS Quiz: Chapter 5 Quiz Time Remaining: 01:22:19 Submit Quiz s & Tet This Question: 1 pt 3 of 7 (0 complete) v This Quiz: 7 pts possible A computer can be classified as either cutting-edge or ancient 96% of computers are classified as ancient (a) Two computers are chosen at random. What is the probability that both computers are ancient? (b) Seven computers are chosen at random. What is the probability that all seven computers are ancient? (c) What is the probability that at least one of seven randomly selected computers is cutting-edge? Would it be unusual that at least one of seven randomly selected computers is cutting-edge? a) The probability is (Round to four decimal places as needed) (b) The probability is (Round to four decimal places as needed.) (c) The probability is (Round to four decimal places as needed) 17 that at least one of seven randomly selected computers is cutting-edge T Enter your answer in each of the answer boxes. mple Tests rade Chapter 1 Pre-TestExplanation / Answer
p = 0.96
P(X = x) = nCx * px * (1 - p)n-x
a) n = 2
P(X = 2) = 2C2 * 0.962 * 0.040 = 0.9216
b) n = 7
P(X = 7) = 7C7 * 0.967 * 0.040 = 0.7514
c) P(X > 1) = 1 - P(X = 0)
= 1 - 7C0 * 0.960 * 0.047
= 1 - 0
= 1
It would not be unusual , because the probability is not less than 0.05
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