SOLUTION: A researcher tries to compare grades earned on the first quiz by boys and girls. He randomly chooses 10 students from boys and 15 students from girls and calculates the confidence

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Question 976722: A researcher tries to compare grades earned on the first quiz by boys and girls. He randomly chooses 10 students from boys and 15 students from girls and calculates the confidence interval on difference between means. How many degrees of freedom will you get in this t distribution?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
The degrees of freedom (df) is equal to the smaller of n%5B1%5D-1 and n%5B2%5D-1

n%5B1%5D-1+=+10-1+=+9
n%5B2%5D-1+=+15-1+=+14

So the degrees of freedom is df = 9