APFIVE Binomial Probability and Standard Deviation
A manufacturing process produces defective parts 12% of the time. For a random sample of 20 parts, what is the probability that the number of defective parts is within 1 standard deviation of the mean (i.e., between one standard deviation below the mean and one standard deviation above the mean, inclusive, rounded to four decimal places)?
A
0.6842
B
0.6800
C
0.6826
D
0.5328
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