For the House Selling Prices OR data file on the book€™s website, 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 age group.
a. Using information given in the tables, show how to construct a 95% confidence interval comparing the population means of new and medium-aged houses.
b. Interpret the confidence interval.

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Age Mean N StDev 125.9 New 78 305.8 Medium 72 242.8 79.3 217.5 Old 37 85.4 13 316.3 Very Old 195.4 Source DF MS Age Condition 281852 93951 7.70 3 0.000 196 2387017 12179 Error 199 2668870 Total