T Critical Value Examples

Example 1

Evaluate the t critical value with the help of given values:

Significance level = 0.01

Number of samples = 25. 

Solution

Step 1: First of all, find the degree of freedom (Df) by taking the difference of 1 and the number of samples.

Df = 25 – 1

Df = 24

Step 2: Now take a one-tailed or two-tailed t-distribution table. Search the value of the degree of freedom in the leftmost column of the table. 

Step 3: Now choose the value of the significance level in the topmost row of the t table.

Step 4: To calculate the t critical value, get the value where both degrees of freedom and significance level intersect.

t critical value = 2.4851