Directions: Read the questions carefully. Write the letter of the correct answer.

1.) If a random sample size 16 is taken with replacement from the population 1, 1, 1, 2, 4, 5, 5, and 6. what is the mean?
a. 25/8 or 3.13
b. 35/8 or 4.375
c. 26/5 or 5.2
d. 27/4 or 6.75 32

2.) Refer to question 1. What is the variance?
a. 3.86
b. 3.88
c. 3.87
d. 3.99 33

3.)What is the t- value when n = 22 at x = 0.01
a. t = 2.518
b. t = 2.616
c. t = 2.723
d. t = 1.999

4.) What is the area between t 0.02 and -t 0.01?
a. 0.97
b. 0.98
c. 0.99
d. 0.95

5.) Find the t-value when u= 47, * = 45, s = 4 and n = 25.
a. 1.5
b. 2.5
c. 3.5
d. 4.5

6.) Compute the 95% confidence interval estimate of u given the following s = 9, n = 12, and x = 27.
a. 23.19 < u < 30.81
b. 22.19 < u < 30.81
c. 21.19 < u < 30. 81
d. 24.19 < u < 30.81​​​​