Question 1A) The two samples below are independent from Normal populations with equal variances.

Sample 1 : n = 16 ; Sum of X = 359 ; Sum of x sqd = 8,452

Sample 2 : n = 14 ; Sum of X = 201 ; Sum of x sqd = 4,089

Test the hypothesis that u1 ≤ u2 at a = 0.1 . State the hypothesis in terms of 1-2

Step 1 : What is the degrees of freedom (df) ?

Step 2 : What is the t crit ? Answer must be typed to either 2 or 3 decimals depending on whether the Z or t table is appropriate.

Step 3 : What is the test statistics ( t stat) ? Answer must be typed to either 2 or 3 decimals depending on whether the z or t table is appropriate.

Step 4 : Find P-value(s) ?

Question 2B) Construct a 90% confidence interval for the difference in true means. State the C.I. in terms of Boston-Buffalo

Lower endpoint ______

Upper endpoint ______