Using the following uniform density curve, SELECT ALL APPLICABLE CHOICES determi

Question

Using the following uniform density curve, SELECT ALL APPLICABLE CHOICES determine what is the probability that a random variable has a value between 3 and 12? A) 50.909% 44.909% 40.909% 30.909% E) F) 42.242% 39.909% G) None of These 21 Use the normal distribution to approximate the desired probability. A coin is tossed 22 times. AA person, w perception, is asked to predict the outc each flip in advance. She predicts correctly on 13 tosses. What is the probability of being correct 13 or more times by guessing? SELECT ALL APPLICABLE CHOICES ho claims to have extrasensorv ome of 26.57156% 25.67156% 26.42156% 26.37156% 25.95490% 26.12156% G) None of These

Explanation / Answer

21) Mean = 22*0.50 = 11

Standard deviation = SQRT(22*0.50*0.50)= 2.3452

P(X>=13)

= P(Z>(12.5-11)/2.3452)

= P(Z>0.6396)

= 26.12156%

Option F is Correct

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