Question
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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Physics Principles with Applications
Authors: Douglas C. Giancoli
7th edition
978-0321869111, 321625927, 9780321733627, 321869117, 9780321625922, 321733622, 978-0321762429
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