Il content l Assessments |. Communication Resources lLbrary Exam 1 fall17 - Quiz
ID: 3305373 • Letter: I
Question
Il content l Assessments |. Communication Resources lLbrary Exam 1 fall17 - Quiz t: 1:04:10 Zachary Bradshaw: Attempt 1 Question 31 (3 points) Examine the discrete probability distribution given in the table. Calculate the expected value of random vaniable x Round your answer to two decimal places x P(x 2.5 0.10 4.5 0.15 6.0 0.20 0 0.25 12.00.30 Your Answer: Answer Save Question 32 (3 points) More than 40 million Americans are estimated to have at least one Not all graduates pay back thei debt in satisfactory fashion. Suppose that the following table shows data for a randomly not the student had received a college degree. Calculate the conditional probability of delinquent status given that the person did not earn a college degree. student loan to help pay for college expenses sample of Americans. The table contains student loan repayment status (satisfactory or delinquent) and whether or e Degree No 278 Satisfactor Delinquent 135 Hint: Add marginal totals to the table. Round your answer to three decimal places 225 Your Answer Answer SaveExplanation / Answer
1.
The expected value is basically the probability weighted value of X
Therefore, E(X) = Addition of all p(x) multiplied by X.
So, we will do the following to get the expected value :
So, E(X) = 2.5*.1+4.5*.15+6*.2+9*.25+12*.3
E(X) = 7.975
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