# Question 10 of 20 10 10 points a company wants to

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Question 10 of 20 1.0/ 1.0 Points
A company wants to evaluate its attrition rate, in other words, how long new hires stay with the company. Over the years, they have established the following probability distribution. Let X = the number of years a new hire will stay with the company. Let P ( x ) = the probability that a new hire will stay with the company x years. 1. Complete Table using the data provided. x P ( x ) 0 0.12 1 0.18 2 0.30 3 0.15 4 0.10 5 0.10 6 0.05
Question 11 of 20 1.0/ 1.0 Points Let X be the number of courses taken by a part-time student at a college. The following table shows the probability distribution of X with probability as a percentage. Number of Courses , x 1 2 Probability, P ( X = x ) 52% 28% 20% What is the probability that a randomly selected part-time student at this college takes at least 2 courses? (That is, find P(X 2) 3
Answer Key:0.48|.48 Feedback: Greater than or equal to 2 is 2 AND 3. P(x =2) + P(x = 3) .28 + .20 Question 12 of 20 1.0/ 1.0 Points Does the following table represent a valid discrete probability distribution? x 1 2 3 4 5 P ( X = x ) 0.16 0.11 0.06 - 0.36 0.21
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