A publishing company has just published a new college book. The research department at the company took a random sample of 25 comparable textbooks and collected information on their prices. This information produced a mean price of 145 pesos. It is known that the standard deviation of all the prices of all such textbooks is 35 pesos and the population distribution is approximately normal. Construct a 90%confidence interval for the mean price of all such college textbooks. a.133.45 pesos to 156.55 pesos b.138 pesos to 152 pesos c.None of the above d.134 pesos to 156 pesos

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A publishing company has just published a new college book. The research department at the company took a random sample of 25 comparable textbooks and collected information on their prices. This information produced a mean price of 145 pesos. It is known that the standard deviation of all the prices of all such textbooks is 35 pesos and the population distribution is approximately normal. Construct a 90%confidence interval for the mean price of all such college textbooks.
a.133.45 pesos to 156.55 pesos
b.138 pesos to 152 pesos
c.None of the above
d.134 pesos to 156 pesos
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