Answer the following:

The answer are already given. I just need a solution

2.15

3.25

4.31

2. Given: Margin of error (d)= 2.19, Confidence interval (CI) of population mean # 90%, and population standard deviation (o)= 5 solve for the appropriate sample size. a. 13 c. 15 b. 14 d. 16 3. Given: d= 3.92 CI- 94% 0# 7 n-? a. 25 c. 27 b. 26 d. 28 4. Given: d= 2.4 CI= 98% 0=6.4 n=? a. 28 c. 30 b. 29 d. 31