This material may consist of step-by-step explanations on how to solve a problem or examples of proper writing, including the use of citations, references, bibliographies, and formatting. This material is made available for the sole purpose of studying and learning - misuse is strictly forbidden.
Since n < 30 we will use a t distribution with (n-1) degrees of freedom. The critical value for a 95% confidence interval with 19 degrees of freedom is 2.093.
Lower limit: 9.1 – 2.093 x 0.538 = 7.974
Upper limit: 9.1 + 2.093 x 0.538 = 10.226
The confidence interval is...
This is only a preview of the solution. Please use the purchase button to see the entire solution