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A random sample of current National Football League and Major League Baseball pl

ID: 3291507 • Letter: A

Question

A random sample of current National Football League and Major League Baseball players was taken to determine how many received a degree from the college/university they attended. Below is a partial table of data associated with both simple and joint probabilities:

                                                                                           League

                                                                                  NFL                 MLB             Totals

                                                                     Degree               .39                                         .63

College/University                                   No degree                                .26

                                                                              Totals       .50                                        1.00

         

     

            a..   What is the conditional probability that a player is an NFLer, given he did not

                   receive a degree?

            b.    What is the conditional probability that a player received a degree,

                   given that he is a MLBer.

            c.    Are the events League and College/University statistically independent?

            d.   Show the calculations that led you to your conclusion in “g.”

Explanation / Answer

a)

conditional probability that a player is an NFLer, given he did not receive a degree =0.11/0.37 =0.2973

b)

conditional probability that a player received a degree, given that he is a MLBer =0.24/0.5=0.48

c)

here probability of degree and MLB =0.24/1 =0.24

and P(degree )*P(MLB) =0.63*0.5=0.315

as above two are not equal therefore they are not independent.

d) calcuation is shown in above

NFL MLB total degree 0.39 0.24 0.63 no degree 0.11 0.26 0.37 total 0.5 0.5 1
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