2. Normal Problem (Use info in Section 6-3.) Engineers must consider the widths of peoples' heads when designing face masks. Suppose men have head widths that are normally distributed with a mean of 6.125 inches and a standard deviation of 1.03 inches. a. If one male is randomly selected, find the probability that his head breadth is less than 6.5 inches. b. If a random sample of 25 males is selected, find the probability that the mean of their head breadths is less than 6.5 inches. c. Is there a difference in the two answers? Explain your answer statistically.
2. Normal Problem (Use info in Section 6-3.) Engineers must consider the widths of peoples' heads when designing face masks. Suppose men have head widths that are normally distributed with a mean of 6.125 inches and a standard deviation of 1.03 inches. a. If one male is randomly selected, find the probability that his head breadth is less than 6.5 inches. b. If a random sample of 25 males is selected, find the probability that the mean of their head breadths is less than 6.5 inches. c. Is there a difference in the two answers? Explain your answer statistically.
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.3: Binomial Probability
Problem 40E: Telephone Marketing A mortgage company advertises its rates by making unsolicited telephone calls to...
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