Two groups were randomly assigned to spend 15 minutes either in a hot room (defined as 90 degrees) or a cold room (defined as 30 degrees). After the 15 minutes elapsed, a mood measure was completed by participants. Scores on the measure of mood ranged from 1-20, with higher scores indicating a better mood. Using an alpha of .05, test for a difference between the groups.Is this a one-tailed or two tailed test? Why?What are the degrees of freedom associated with this test?Calculate the t ratio. What is it?Which is the correct conclusion regarding the null hypothesis?

\f