Using a calculator, the critical value of the t-distribution that should be used for a <u>95% confidence interval with 20 observations</u> is of t* = 2.0930.
<h3>How to find the critical value of the t-distribution?</h3>
A calculator is used, with two inputs:
- 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
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