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For the S&P Stock Index of all major stocks, the mean P/E ratio is u=19.4. A...

For the S&P Stock Index of all major stocks, the mean P/E ratio is u=19.4. A random sample of 36 “socially conscious” stocks gave a P/E ratio sample mean of xbar= 17.9. Assume the standard deviation is σ=5.2. Use a hypothesis test at the a= 0.10 significance level to determine whether the mean P/E ratio for all socially conscious stocks is different either way from the mean P/E ratio of the S&P Stock Index.

Construct a 90% confidence interval for the mean P/E ratio for all socially conscious stocks and interpret the confidence interval in a complete sentence.

Math   Statistics-And-Probability   
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