Question: Refer to Problem 9. Find the mean and standard deviation for the number of defective batteries in the sample of size 50. Problem 9 At

Refer to Problem 9.

Find the mean and standard deviation for the number of defective batteries in the sample of size 50.

Problem 9

At a cell phone battery plant, 5% of cell phone batteries produced are defective. A quality control engineer randomly collects a sample of 50 batteries from a large shipment from this plant and inspects them for defects. Find the probability that

a. None of the batteries are defective.

b. At least one of the batteries is defective.

c. No more than 3 of the batteries are defective.

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