Question

Exam 84 (Sects. 4.1-5.2) Thirty-five percent of 1. con sumers prefer to purchase electronics online.You randomly select 8 consumers. Find the that the number of consumers who prefer to purchase electronics online is (a) exactly five, (b) more than five, and (c) at most five. ID (a) Find the probability that the number that prefer to purchase electronics online is exactly five. P(5) (Round to three decimal places as needed.) (b) Find the probability that the number that prefer to purchase electronics online is more than five. P(x> 5) (Round to three decimal places as needed.) (c) Find the probability that the number that prefer to purchase electronics onl ine is at most five. (Round to three decimal places as needed.) What requirements are necessary for a 12. Choose the correct answer below. A. The mean and standard deviation have the values of μ 0 and σ-1. O B. The mean and standard deviation have the values of μ 1 and σ-1. ° C. The mean and standard deviation have the values of :0 and ơ :0. 0 D. The mean and standard deviation have the values of μ-1 and σ .0. Find the area of the shaded region under the standard normal curve. If convenient, use technology to find the area. 13. 2.08 The area of the shaded region is (Round to four decimal places as needed.)

Answer 1

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X has binomial distribution with p-0.35 and n-8 PMF of the distribution P(x-x) )p"(1-p)"-X a) P(x-5)-(0.35)(1-0.35)8-5-0.081 -0.021747+0.003346+0.000225 0.025 -0.0319+0.1373+0.2587+0.2786+0.1875+0.0808 0.975

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