Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.67 and standard deviation 0.81. USE SALT (a) If a random sample of 25 specimens is selected, what is the probability that the sample average sediment density is at most 3.00? Between 2.67 and 3.00? (Round your answers to four decimal places.) at most 3.00 between 2.67 and 3.00 (b) How large a sample size would be required to ensure that the first probability in part (a) is at least 0.99? (Round your answer up to the nearest whole number.) specimens

Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.67 and standard deviation 0.81. USE SALT (a) If a random sample of 25 specimens is selected, what is the probability that the sample average sediment density is at most 3.00? Between 2.67 and 3.00? (Round your answers to four decimal places.) at most 3.00 between 2.67 and 3.00 (b) How large a sample size would be required to ensure that the first probability in part (a) is at least 0.99? (Round your answer up to the nearest whole number.) specimens

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.3: Special Probability Density Functions

Problem 8E

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