20 The property values for three homes selected at random in the Forest Ridge subdivision are (in thousands of dollars) 110. 120. 130 The property values for two homes selected at random in the Hennitage subdivision arc 180, 200.

a) Use small-sample methods to construct a 90% confidence interval for the difference in mean property values between the Hermitage and Forest Fudge subdivisions Interpret. What assumptions have you made?

b) Find the P-value for testing Hn: = 2 against H 2 Interpret. Explain the correspondence between results of the confidence interval and results of the test

c) Using computer software, contpale results of the test that assumes equal population variances to that of the approximate / test that does not require that assumption. Interpret