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28-08-2019
Mathematics

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Construct a 95% confidence interval for the population mean, mu. Assume the population has a normal distribution. A sample of 25 randomly English majors has a mean test score of 81.5 with a standard deviation of 10.2. A. (77.29, 85.71) B. (66.35, 69.89) C. (56.12, 78.34) D. (87.12, 98.32)

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28-08-2019

Answer:

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s29401361 s29401361

02-12-2020

Answer:

B 95 divided by 25=69.89 and 81.5 divided by 10.2= 69.89

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