"> (Answered) Problems 4.9, 4.15, 4.19, 4.23, 4.45, and 4.49 in the textbook. 4.9 Referring to the contingency table in Problem 4.8, if an employed adult is - Tutorials Prime

## (Answered) Problems 4.9, 4.15, 4.19, 4.23, 4.45, and 4.49 in the textbook. 4.9 Referring to the contingency table in Problem 4.8, if an employed adult is

Problems 4.9, 4.15, 4.19, 4.23, 4.45, and 4.49 in the textbook. 4.9 Referring to the contingency table in Problem 4.8, if an employed adult is

Can I please get assistance with the following questions via excel . thank you -Â Â individual sheets/tabs pleaseProblems 4.9, 4.15, 4.19, 4.23, 4.45, and 4.49 in the textbook.

4.9

Referring to the contingency table in Problem 4.8, if an employed

adult is selected at random, what is the probability that

a. the employed adult felt tense or stressed out at work?

b. the employed adult was a male who felt tense or stressed out at

work?

c. the employed adult was a male or felt tense or stressed out at

work?

d. Explain the difference in the results in (b) and (c).

4.15

Each year, ratings are compiled concerning the performance

of new cars during the first 90 days of use. Suppose that the cars

have been categorized according to whether a car needs warrantyrelated

repair (yes or no) and the country in which the company

manufacturing a car is based (United States or not United States).

Based on the data collected, the probability that the new car needs

a warranty repair is 0.04, the probability that the car was manufactured

by a U.S.-based company is 0.60, and the probability that the

new car needs a warranty repair and was manufactured by a U.S.-

based company is 0.025. Construct a contingency table to evaluate

the probabilities of a warranty-related repair. What is the probability

that a new car selected at random

a. needs a warranty repair?

b. needs a warranty repair and was manufactured by a U.S.-based

company?

c. needs a warranty repair or was manufactured by a U.S.-based

company?

d. needs a warranty repair or was not manufactured by a U.S.-

based company?

4.19

If P1A2 = 0.7, P1B2 = 0.6, and A and B are independent,

find P(A and B).

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