Question

JB Nimble cares about the length of candle sticks. The lengths of his favorite type of candle are supposed to be 15 inches, but he notices that lengths vary from candle to candle. So, he wants to know whether or not the mean length of his favorite type of candle really is 15 inches. So, he carefully measures the lengths of a simple random sample of 20 candles of this type and based on his data, he calculates a mean of 15.6 inches and a standard deviation of 1.2 inches.

Assuming that candle stick lengths are approximately normally distributed, which of the choices below best describes the P-value of the appropriate hypothesis test?

• A. P-value = 0.025

• B. 0.01 < P-value < 0.02

• C. P-value = 0.0125

• D. 0.02 < P-value < 0.04

Answer 1

Let denotes the mean length of his favorite type of candle.

ans-> D. 0.02 < P-value < 0.04