Question

Suppose a government department would like to investigate the relationship between the cost of heating a home during the month of February in the Northeast and the​home's square footage. The accompanying data set shows a random sample of 10 homes. Construct a​ 90% confidence interval to estimate the average cost in February to heat a Northeast home that is 2,600 square feet.

Heating		Square		Heating		Square
Cost​ ($)		Footage		Cost​ ($)		Footage
320		2420		460		2610
300		2430		330		2220
290		2030		380		3130
260		2210		340		2510
310		2340		360		2920

Determine the upper and lower limits of the confidence interval.

Answer 1