Mathematics
YerSchieferstein
2016-04-24 19:45:12
A coin is tossed 72 times. Find the standard deviation for the number of heads that will be tossed
ANSWERS
MilissaSassaman30
2016-04-25 01:10:36

The probability of obtaining a head or tail in tossing a coin is modeled by the binomial distribution. The probability of obtaining heads (success) is p = 1/2. In n tosses, the expected statistical parameters are m = np, the mean σ = √[np(1-p)] In 72 tosses of the coin, the standard deviation for the number of heads obtained is σ = √[72*(0.5)*(0.5)]    = 4.243 Answer: 4.243

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