Mathematics, 24.03.2020 22:35 taishaun
(4.2.20) An insurance company offers a discount to homeowners who install smoke detectors in their homes. A company representative claims that 80% or more of policyholders have smoke detectors. You draw a random sample of eight policyholders. Let X be the number of policyholders in the sample who have smoke detectors. a. If exactly 80% of the policyholders have smoke detectors, what is P(X ≤ 1)? b. Based on the answer to part (a), if 80% of the policyholders have smoke detectors, would one policyholder with a smoke detector in a sample of size 8 be an unusual small number? Explain. c. If you found that one of the eight sample policyholders had a smoke detector, would this be convincing evidence that the claim is false? Explain. d. If exactly 80% of the policyholders have smoke detectors, what is P(X ≤ 6)? e. Based on the answer to part (d), if 80% of the policyholders have smoke detectors, would six policy holders with smoke detectors in a sample of size 8 be an unusually small number? Explain. f. If you found that six of the eight sample policyholders had smoke detectors, would this be convincing evidence that the claim is false? Explain.
Answers: 2
Mathematics, 22.06.2019 01:50
Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm.it decreased by the same amount each year. what was the change in grandpa ernie's height each year
Answers: 2
Mathematics, 22.06.2019 05:40
The weight of a small starbucks coffee is a normally distributed random variable with a mean of 340 grams and a standard deviation of 11 grams. find the weight that corresponds to each event. (use excel or appendix c to calculate the z-value. round your final answers to 2 decimal places.)highest 30 percent middle 70 percent highest 90 percent lowest 20 percent
Answers: 3
(4.2.20) An insurance company offers a discount to homeowners who install smoke detectors in their h...
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