Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.64 and standard deviation 0.91. n 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 2.64 and 3.00? (Round your answers to four decimal places.) at most 3.00 .9761 between 2.64 and 3.00 .4761 (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.) 51 x specimens You may need to use the appropriate table in the Appendix of Tables to answer this question.

Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.64 and standard deviation 0.91. n 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 2.64 and 3.00? (Round your answers to four decimal places.) at most 3.00 .9761 between 2.64 and 3.00 .4761 (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.) 51 x specimens You may need to use the appropriate table in the Appendix of Tables to answer this question.

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MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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I'm not sure why the last section is incorrect.

Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.64 and standard deviation 0.91.
n 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 2.64 and 3.00? (Round your answers to four decimal places.)
at most 3.00
.9761
between 2.64 and 3.00
.4761
(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.)
51
X specimens
You may need to use the appropriate table in the Appendix of Tables to answer this question.

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