A confidence interval for the price of gasoline from a random sample of 30 gas stations in

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A confidence interval for the price of gasoline from a random sample of 30 gas stations in a region gives the following statistics:

y = + 4.49 SE1y2 = + 0.06

a) Find a 95% confidence interval for the mean price of regular gasoline in that region.

b) Find the 90% confidence interval for the mean.

c) If we had the same statistics from a sample of 60 stations, what would the 95% confidence interval be now?

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Business Statistics

ISBN: 9780321925831

3rd Edition

Authors: Norean Sharpe, Richard Veaux, Paul Velleman

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Question Posted: May 15, 2015 02:20 AM

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A confidence interval for the price of gasoline from a random sample of 30 gas stations in

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a The confidence interval equation is y t n 1 SEyWe need to find t...View the full answer

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