Sunday, May 8, 2011

Using the correct degrees of freedom

In a research to compare spending between male and female students the following samples were used:
male - 23
female -22
Find the t-value at a 95% confidence level .

1 comment:

  1. d.f = 22-1 = 21
    Use n from the female sample since its the smaller one.
    Go to the t-table, locate 0.05, first line in top. look for 21 degrees of freedom.
    the answer is 1.725