The probability is 0.4 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant. In eight traffic fatalities, find the probability that the number, Y, which involve an intoxicated or alcohol-impaired driver or nonoccupant is
d. Obtain the standard deviation of Y.
Answer
Sample size is n = 8
probability = 0.4 = p
We know that the formula for the standard deviation is given as
Standard deviation =
setting the given values, we get
Standard deviation =
So, the required standard deviation is 1.39 (rounded to two decimals)
The probability is 0.4 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant....
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