Fifteen percent of people in a city eligible to donate blood actually do. You ra

Question

Fifteen percent of people in a city eligible to donate blood actually do. You randomly select four eligible blood donors and ask them if they donate blood Complete parts (a) through (c) below (a) Construct a binomial distribution for n = 4 and p = 0.15 P(x) (Round to three decimal places as needed.) (b) Graph the binomial distribution using a histogram and describe its shape Choose the correct graph below O c. P(x) P(x) P(x) P(x) Choose the correct answer below O Skewed left O symmetric Skewed right (c) What values of the random variable x would you consider unusual? eligible adults out of every 4 gives blood. Since I would be unusual because the associated probability(probabilities) is(are) On average. npq = the standard deviation of this distribution is adult(s) The value s | 0.05 (Round to four decimal places as needed.)

Explanation / Answer

Solution:- Given that n = 4 , p = 0.15

Formula :- P(X = r) : nCr * pr * qn-r

a)

b) option B.

=> option C. Skewed right

c) on average,0.6 eligible adults out of every 4 gives blood.Scine sqrt(npq) = 0.7141,the standard deviation of this distribution is 0.8450 adults.the value 2, 3, 4  would be unusual because the associated probability (probabilities) is (are) 0.05.

x P(x) 0 0.5220 1 0.3685 2 0.0975 3 0.0115 4 0.0005

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