Confidence interval for true variance in high tide level

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Reference no: EM131431097

Physical Sciences

St. Simons Island, Georgia, is a popular vacation destination. Attractions include a salt-marsh tour, a dolphin watch, a golf course, and the art and antiques trail. In a sample of high-tide observations (in feet) from June 2013, = 7.07, σ = 0.702, and n = 30. 36

a. Assuming normality, find a 99% confidence interval for the true variance in high-tide level.

b. Historical evidence suggests the variance in high tide is 0.50. Is there any evidence to suggest the variance in high tide has decreased? Justify your answer. Write a Solution Trail for this problem.

Reference no: EM131431097

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