The onesample t statistic from a sample of n 15 observation

The one-sample t statistic from a sample of n = 15 observations for the two-sided test of H0: = 50 Ha: 50 has the value t = 2.50.

Step 1:
What are the degrees of freedom for t?

Step 2:
Is the value t = 2.50 statistically significant at the 10% level? At the 5% level?

Solution

The degrees of freedom is n-1=15-1=14

B)

The value t = 2.50 is significant both at the 10% level and at the 5% level.