For the House Selling Prices OR data file on the text CD, the output shows the result of conducting an ANOVA comparing mean house selling prices (in $1000) by Age Category ( New = 0 to 24 years old, Medium = 25 to 50 years old, Old = 51 to 74 years old, Very Old = 75 + years old ). It also shows a summary table of means and standard deviations of the selling prices, by condition. Consider the New and Medium ages, where 150 of the 200 observations fall.
a. Using information given in the tables, show how to construct a 95% confidence interval comparing the corresponding population means.
b. Interpret the confidence interval.

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Age Medium New old Very Old Mean StDev 71 243. 79.5 78 305.8 125.9 37 215.7 85.3 14 311.6 188.5 MS Source Age Condition 3 281272 93757 7.70 0.000 Error Total DF 196 2387598 12182 199 2668870