1. State the total degrees of freedom for the following t tests:
a) n = 12 for one-sample t test
b) df1 = 12, n2 = 19 for a two-independent-sample t test
c) Critical value = 1.645 for a one-tailed test, Î± = .05
d) Critical value = 63.657 for a two-tailed test, Î± = .01

2. State the critical values for a two-independent-sample t test given the following conditions:
a) Two-tailed test, Î± = .05, n = 12 in each group
b) One-tailed test, lower-tail critical, Î± = .01, df = 15 for each group
c) Two-tailed, Î± = .01, total df = 26
d) One-tailed test, upper-tail critical, Î± = .05, n for both groups combined is 30

3. To demonstrate flavor aversion learning (that is, learning to dislike a flavor that is associated with becoming sick), researchers gave one group of laboratory rats an injection of lithium chloride immediately following consumption of saccharin-flavored water. Lithium chloride makes rats feel sick. A control group was not made sick after drinking the flavored water. The next day, both groups were allowed to drink saccharin-flavored water. The amounts consumed (in milliliters) for both groups during this test are given below.

Amount Consumed by Rats That Were Made Sick (n = 4) and Amount Consumed by Control Rats (n = 4)
4 7
5 12
1 8
3 11

a) Test whether or not consumption of saccharin-flavored water differed between groups using a .05 level of significance. State the value of the test statistic and the decision to retain or reject the null hypothesis.
b) Compute the effect size using eta-squared (Î·Â²)

1. State the total degrees of freedom for the following t tests:...