In a test for acid rain, a random sample of 49 water samples showed a mean pH level of 4.4 with a standard deviation of 0.35. Find a 90%confidence interval estimate for the mean pH level.O a.O b.O C.O d.O e.0.354.4 ± 1.677 (0,25)494.4 +1.6454.4 + 1.677(0.35)(0.65)5004.41.645(0.35) (0.65)5004.4 ± 1.645 (0:35)490.3549-1

given data sample size (n) = 49sample mean ( x¯ ) = 4.4sample standard deviatio (s) =0.3590% ci for…

Answered: In a test for acid rain, a random…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A random sample of size 49 from normal population yields, mean = 7.2 and standard deviation = 2.8. The lower bound of a 99 percent confidence interval for population mean is O a. 6.40 O b. 6.53 O c. 6.13 O d. 6.68
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