The J.O.Supplies Company buys calculators from a Korean supplier.The probability of a defective calculator is 10%. If 100 calculators are selected at random,what is the standard deviation of the number of defectives?
A)9.00
B)3.17
C)9.49
D)3.00

Question

Quizplus · Accepted Answer

The standard deviation for a binomial distribution is calculated using the formula √(n * p * (1-p)), where n is the number of trials and p is the probability of success. Here, n = 100 and p = 0.10, so the standard deviation is √(100 * 0.10 * 0.90) = √9 = 3.00.

The JOSupplies Company Buys Calculators from a Korean Supplier