Question

Determine the critical value, tc for a 80% confidence interval and the sample size, n=11.​

Answer 1

Answer:

To find a critical value, look up your confidence level in the bottom row of the table; this tells you which column of the t-table you need. Intersect this column with the row for your df (degrees of freedom). The number you see is the critical value (or the t*-value) for your confidence interval.