how to calculate (S-) 2 P(S) why it is 0.15905?? 7. A local restaurant is holdin
ID: 3305396 • Letter: H
Question
how to calculate (S-)2P(S) why it is 0.15905??
7. A local restaurant is holding a weekly trivia contest, in which customers can answer questions to win prizes. Each contestant gets to answer a maximum of three questions. The first question is easy. The probability that you would answer it correctly is .75. The second question is harder. The probability of answering it correctly is .60. The final question is pretty hard. The probability of answering it correctly is .15. CRUCIAL RULE: Every contestant gets to answer the first two questions, but only those who get both of the first two questions right are allowed to answer the third question. Let S be a random variable for the number of successfully answered questions you have over the course of the game. You are about to try and play the game THE PDF IS THE FIRST TWO COLUMNS. THE REST OF THE TABLE I JUST PUT THERE IN CASE STUDENTS WANTED TO USE IT. IT ISN'T REQUIRED. a. (10 points) Write down a table containing the entire PDF of S P(S SP(S) 0*.1-0 1*.525-.45 2*.3825-.765 3*.0675-2025 (S-H)PP(S) .15905 .104082 094243 253211 0 25*.401 .75*.4+.25*.6-.45 75*.6*.85-.3825 75*.6*.15.0675 1.4175 .578194 SD-.76Explanation / Answer
= S*P(S) = 1.4175
(S-)2P(S) for S = 0 is (0-1.4175)2*0.1 = 0.20093
The calculation for (S-)2P(S) is wrong and needs to be updated.
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