Question

Use the paired t-interval procedure to obtain the required confidence interval. You may assume that the conditions for using the procedure are satisfied. lf d = 3.125, sd-2.911, and n = 8, determine a 90% confidence interval for 1- 2. O A. 1.175 to 5.075 B. 2.435 to 3.815 ° C. 2.435 to 5.075 O D. 0.215 to 6.035

Answer 1

Ans : Option A.

Option A sample mean = x^bar = 3.125 sample S.D = s = 2.911 sample size = n = 8 significance level = alpha = 0.1 critical value = t*= 1.895 standard erroe = s/squareroot n = 1.0292 margin of error = t*s/squareroot n = 1.9499 lower limit = x^bar- margin of erroe = 1.175 upper limit = x^bar + margin of erroe = 5.075 the 90% C.I is (1.175,5.075)or 1.175 < mue < 5.075