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According to a certain organization, approximately 28% of adults in the United States live with a disability. This includes disabilities affecting mobility, cognition, vision, hearing, and others. Suppose that we select a random sample of five US adults, and let x = the number of adults out of five that live with a disability. The methods of Section 5.2 can be used to compute the probability assignments for the x distribution.
x 0 1 2 3 4 5
P(x) 0.193 0.376 0.293 0.114 0.022 0.002
B. Find the probability that three or more of the five adults lives with a disability. (Round your answer to three decimal places.0
C. Find the probability that four or more of the five adults lives with a disability (Round your answer to three decimal places.)
D. Compute , the expected number of adults living with a disability out of five. (Round your answer to two decimal places.)
E. Compute , the standard deviation of the number of adults living with a disability out of five. (Round your answer to two decimal places.)
Sagot :
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