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The diameter of a brand of ping-pong balls is approximately normally distributed, with a mean of 1.29 inches and a standard deviation of 0.08 inch. A random sample of 16 ping-pong balls is selected. Complete parts (a) through (d). distribution O B. Because the population diameter of Ping-Pong balls is approximately normally distributed, the sampling distribution of samples of 16 will not be approximately normal. O C. Because the population diameter of Ping-Pong balls is approximately normally distributed, the sampling distribution of samples of 16 can not be found. D. Because the population diameter of Ping-Pong balls is approximately normally distributed, the sampling distribution of samples of 16 will also be approximately normal. b. What is the probability that the sample mean is less than 1.27 inches? PX 1.27) = 0.1587 (Round to four decimal places as needed.) c. What is the probability that the sample is between 1.27 and 1.32 inches? P(1.27<X< 1.32)= 0.7745 (Round to four decimal places as needed.) d. The probability is 60% that the sample mean will be between what two values, symmetrically distributed around the population mean? The lower bound is inches (Round to two decimal places as needed.) The upper bound is inches. (Round to two decimal places as needed.) View an example Textbook Calculator Clear all Check answer