Question 32 (3 points) More than 40 million Americans are estimated to have at l

Question

Question 32 (3 points) More than 40 million Americans are estimated to have at least one outstanding student loan to help pay for college expenses Not all graduates pay back thei debt in satisfactory fashion. Suppose that the following table shows data for a randomly selected sample of Americans. The table contains student loan repayment status (satisfactory or delinquent) and whether or not the student had received a college degree. Calcuiate the conditional probability that the person successfully earned a college degree given that they repayment status Degree 264 164 No 228 363 Hint: Add marginal totals to the table. Round your answer to three decimal places. Your Answer Answer Save Question 33 (3 points) Emergency 911 calls to a smell municipality in Ldeho come in at a rate of 5.3 calls every hour, Assume that the number of 91 a rate calls is a random variable that can be described by a Poisson distribution What is the probability of two or fewer 913 calls in the next hour? Round your anewer to three decimal places of accuracy Page 11 ef 1

Explanation / Answer

Solution: 32)

College degree

Yes

No

Total

Satisfactory

264

228

492

Delinquent

164

363

527

Total

428

591

1019

We have to find P( Person successfully earned college degree given that they had delinquent repayment)

That is, P( Yes / Delinquent ) = 164 / 527 = 0.311

33) We are given x : Poisson random variable with = 5.3 per hr.

We have to fin P( X 2) = ----------?

Using excel,   =POISSON(2,5.3,TRUE)

P( X 2) = 0.102

Done

College degree

Yes

No

Total

Satisfactory

264

228

492

Delinquent

164

363

527

Total

428

591

1019

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