For the House Selling Prices FL data file on the text CD, MINITAB results of a regression analysis are shown for 100 homes relating y = selling price (in dollars) to x = the size of the house (in square feet).
a. Show all steps of a two-sided significance test of independence. Could the sample association between these two variables be explained by random variation?
b. Show that a 95% confidence interval for the population slope is (64, 90).
c. A builder had claimed that the selling price increases $100, on average, for every extra square foot. Based on part b, what would you conclude about this claim?
House selling prices and size of home