Question

What critical value of t* should be used for a 95% confidence interval for the population mean based upon a random sample of 20 observations

Answer 1

Using a calculator, the critical value of the t-distribution that should be used for a 95% confidence interval with 20 observations is of t* = 2.0930.

How to find the critical value of the t-distribution?

A calculator is used, with two inputs:

• The confidence level.

• The number of degrees of freedom, which is one less than the sample size.

In this problem, we have a 95% confidence interval, with 20 - 1 = 19 df, hence the critical value is of t* = 2.0930.

More can be learned about the t-distribution at brainly.com/question/16162795

#SPJ1