A team of psychologists hypothesize that feeling sick isassociated with liking a flavor. They design a study in which ratsare randomly split into two group. In one group the rats are givenan injection of lithium chloride immediately following consumptionof saccharin-flavored water. Lithium chloride makes rats feel sick.The rats in the other group were not given Lithium chloride afterdrinking the flavored water. The next day, all rats could drinksaccharin-flavored water. The amount of saccharin-flavored waterconsumed (in milliliters) for all rat for the next day are givenbelow. What can the psychologists conclude with α =0.01?
| lithium | no lithium |
|---|
4
3
1
3
2
6
8
6
5 | 6
9
6
7
9
7
5
6
7 |
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-testRelated-Samples t-test
b)
Condition 1:
---Select--- lithium chloride saccharin-flavored water disliking aflavor no lithium chloride the rats
Condition 2:
---Select--- lithium chloride saccharin-flavored water disliking aflavor no lithium chloride the rats
c) Compute the appropriate test statistic(s) tomake a decision about H0.
(Hint: Make sure to write down the null and alternative hypothesesto help solve the problem.)
p-value =Â Â ; Decision:Â Â ---Select---Reject H0 Fail to reject H0
d) Using the SPSS results,compute the corresponding effect size(s) and indicatemagnitude(s).
If not appropriate, input and/or select \"na\" below.
d =Â Â ; Â Â ---Select--- na trivialeffect small effect medium effect large effect
r2 =Â Â ; Â Â ---Select--- natrivial effect small effect medium effect large effect
e) Make an interpretation based on theresults.
Rats that were given lithium chloride drank significantly moresaccharin-flavored water than those that were not given lithiumchloride.Rats that were given lithium chloride drank significantlyless saccharin-flavored water than those that were not givenlithium chloride.    There is no significantdifference in saccharin-flavored water drank between rats that weregiven lithium chloride and those that were not.
