Question

9. The principle of redundancy is used when system reliability is improved through redundant or backup components. Assume that a​ student's alarm clock has a 10.1​% daily failure rate. Complete parts​ (a) through​ (d) below.

c. What is the probability of not being awakened if the student uses three independent alarm​ clocks?

​(Round to five decimal places as​ needed.)

14.In a market research survey of 2006 ​motorists, 281 said that they made an obscene gesture in the previous month. Complete parts​ (a) and​ (b) below.

a.If 1 of the surveyed motorists is randomly​ selected, what is the probability that this motorist

did not make an obscene gesture in the previous​ month?

The probability is

​(Round to four decimal places as​ needed.)

B. If 45 of the surveyed motorists are randomly selected without​ replacement, what is the probability that none of them made an obscene gesture in the previous​ month? Should the​ 5% guideline be applied in this​ case? Select the correct choice below and fill in the answer box within your choice.

​(Round to four decimal places as​ needed.)

A. The probability is ______. The​ 5% guideline should be applied in this case.

B. The probability is ______. The​ 5% guideline should not be applied in this case.

15. A tire company produced a batch of 5,400 tires that includes exactly 220 that are defective.

a. If 4 tires are randomly selected for installation on a​ car, what is the probability that they are all​ good?

b. If 100 tires are randomly selected for shipment to an​ outlet, what is the probability that they are all​good? Should this outlet plan to deal with defective tires returned by​ consumers?

(Just answer these)

a. If 4 tires are randomly selected for installation on a​ car, what is the probability that they are all​ good?

(Round to three decimal places as​ needed.)

b. If 100 tires are randomly selected for shipment to an outlet what is the probability that they are all​good?

(Round to three decimal places as​ needed.)

Should this outlet plan to deal with defective tires returned by​ consumers?

No, because there is a very small chance that all 100 tires are good.

Yes, because there is a very small chance that all 100 tries are good

Yes, because there is a very large chance that all 100 tires are good

No, because there is a very large chance that all 100 tires are good.

Answer 1