Mathematics, 12.11.2020 18:50 zianebonankenotdbev

The average annual precipitations (in inches) of random sample of 30 years in San Francisco, California, have a sample mean of 40.12 inches and sample standard deviation of 8.18 inches. Find an 80% confidence interval for the average annual precipitations. a. (39.13, 136.11) b. (38.16, 42.08) c. (8.18, 40.12) d. None of these

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