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ID: 2928542 • Letter: O
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omework 18: Problem 3 Previous (webwork2/wardSTAT2231F20 use leonel kafando%40Georgiasouthern edu&effectivelsereleonel; use leone r kafando%40GeorgiaSo the edu&effectiveUse; leonel user e ne -kafa do%40GeorgiaSoutherned &effectiveUseraleonel; kafando%40Georgias tem edus Problem List (/webwork2/wardSTAT2231 kata do%4 Georgias teme dubl Next (/webwork2/wardSTAT2231F201 kafando%40GeorgiaSo them.edubl (1 point) A man claims to have extrasensory perception (ESP). As a test, a fair coin is flipped 25 times and the man is asked to predict the outcome in advance. He gets 20 out of 25 correct. What is the probability that he would have done at least this welli he had no ESP? Hint: If he has no ESP, then he's just randomly guessing, right? If he is randomly guessing, what should you use as p, the chance of success for each individual trial? Probability of doing at least this well- Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor Page generated at 10/16/2017 at 05:44pm EDT WeBWorK 0 1996-2016 | theme: math4 I ww version: 2.12 1 pg version: 2.121 The WeBWorK Project (http://webwork.maa.org)Explanation / Answer
Answer:
Problem 4.
a).
Expectation = np = 1.2
Variance = np(1 - p) = 0.96
Standard deviation = 0.9798
b).
Expectation = np = 2
Variance = np(1 - p) = 1
Standard deviation = 1
c).
Expectation = np = 3.2
Variance = np(1 - p) = 0.64
Standard deviation = 0.8
d).
Expectation = np = 1.5
Variance = np(1 - p) = 1.05
Standard deviation = 1.0247
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