Question

Find the critical t-value that corresponds to 90%

confidence interval. Assume 20 degrees of freedom.
Answer choices:
a. 2.528
b 1.729
c 1.328
d 1.325
e 1.725

Answer 1

The critical t-value for a 90% confidence interval with 20 degrees of freedom is approximately 1.325.

Step-by-step explanation:

In this case, we need to find the critical t-value that corresponds to a 90% confidence interval.

Given that we have 20 degrees of freedom, we can refer to the t-distribution table or use a calculator to determine the critical value.

From the table, the critical t-value for a 90% confidence interval and 20 degrees of freedom is approximately 1.325.

Therefore, the correct answer is d) 1.325.