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The diameter of a brand of ping-pong balls is approximately normally distributed with a mean of 1.5 inches and a standard deviation of 0.05 inches.
The diameter of a brand of ping-pong balls is approximately normally distributed with a mean of 1.5 inches and a standard deviation of 0.05 inches. A random sample of 25 ping-pong balls is selected.
What is the probability that the sample mean is less than 1.48 inches?
a.0.2698
b.0.0003
c.0.0227
d.0.9773
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