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1.In examining the performance of stocks, it is found that out of a sample of 49 randomly selected stocks, 44 of them very closely follow

1.In examining the performance of stocks, it is found that out of a sample of 49 randomly selected stocks, 44 of them very closely follow the rise and fall of the S&P 500 Index during the week. The beta of such stocks is said to be close to 1. Give a 95% confidence interval for the proportion of all stocks that closely follow the movement of the S&P 500 Index.

[0.08476; 0.9827]

[0.08474; 0.8132]

[0.8132; 0.9827]

None of the above


2.

A paper manufacturer samples 100 sheets of paper with a variance in thickness of 0.0025 inches squared. Construct a 95% confidence interval for the population variance.

[0.001910; 0.043704]

[0.043704; 0.057749]

[0.001910; 0.003335]

None of the above


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