Question

calculate the tscore of 95% confidence interval ,96% confidence interval,99% confidence interval for sample size 25​

Answer 1

Explanation:

To compute the 95% confidence interval, start by computing the mean and standard error: M = (2 + 3 + 5 + 6 + 9)/5 = 5. σM = = 1.118. Z.95 can be found using the normal distribution calculator and specifying that the shaded area is 0.95 and indicating that you want the area to be between the cutoff points

Confidence Level z

0.90 1.645

0.92 1.75

0.95 1.96

0.96 2.05

With a 90 percent confidence interval, you have a 10 percent chance of being wrong. A 99 percent confidence interval would be wider than a 95 percent confidence interval (for example, plus or minus 4.5 percent instead of 3.5 percent).