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. (8 points)

Amount Consumed by Rats That Were Made Sick (n= 4)

4

4

5

3

Amount Consumed by Control Rats (n= 4)

8

6

9

6

1. What is the variance for Group 1 (the rats that were made sick)?

2.What is the standard deviation for Group 2 (the Control rats)?

3.What is the t critical?

4.What is the t obtained?

5.What is your decision regarding the null hypothesis?