. Rats that are bred for the “cancer gene” are tested on their rate of cancer (0
ID: 3228411 • Letter: #
Question
. Rats that are bred for the “cancer gene” are tested on their rate of cancer (0-7). Each “cancer rat” (n = 12) is matched with a non-cancer rat (n = 13) to see if the cancer rates differ. The average rates of cancer for each groups of rats is compared.
Please be sure to answer all the questions #1-#10. Most people do not answer it all the way *************
1.What are the researcher’s independent and dependent variables?
a.Independent=______________________________
b.Dependent=_______________________________
2. What are the null and alternative hypotheses (use the appropriate symbols not words)?
a.H0=__________________
b.H1=__________________
3.What is the appropriate test for the researcher to use?__________________
4.Why is that statistic appropriate?
If applicable to the specific test:
5.What are the test’s assumptions?
6.What are the test’s df?
7.What is the appropriate critical value?
8.If the research obtains a test statistic of 3.09, would the researcher retain or reject H0?
9.Should the researcher do any follow up tests or make any graphs/charts?
10.Interpret the findings in APA style
Explanation / Answer
1.What are the researcher’s independent and dependent variables?
a. Independent variable = cancer rate
b. Dependent variable= cancer gene
2.
The null hypothesis
Ho: µ1 = µ2
The alternative hypothesis
H1: µ1 µ2
3.the appropriate test for the researcher use is Two sample t-test
4 the two sample t-test is appropriate as we are comparing two independent variable..
5. The assumptions are that the observations are independent of each other
6.degrees of freedom =n1+n2-2
=12+13-2
=23
7.critical value - parameters are missing
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