Worth ½ point each
- When conducting an independent t-test, what is the dependent variable?
- The experimental conditions
- The scores
- One of the independent variables becomes the dependent variable in the analysis.
- The term ‘dependent variable’ does not apply to the t-test.
- The
null hypothesis in a two-tailed, independent t-test of means would be:
- m1 £ m2
- m1 ³ m2
- m1 = m2
- m1 ¹ m2
- Choose
the correct statement:
- if the null hypothesis is true, there is no difference between population means.
- if the null hypothesis is false, the samples are considered the same.
- if the null hypothesis is true, there is a difference between population means.
- m1 will never be equal to m2
- An inferential statistical test yields a p-value of .015. Which of the following is true?
- This finding is statistically significant at the .01 level of significance.
- This finding is statistically significant at the .05 level of significance.
- This finding is statistically significant at the .001 level of significance.
- This finding is not statistically significant.
A researcher is interested to see if there is an average difference in the age of male v. female CJ381 students. To examine this, she conducts a t-test. The SPSS output is shown below:
- Construct a one-tailed research hypothesis based on the research question above. (1 pt)
- Write up the results of the t-test in full APA format. Remember, this means that you should include the following:
- mean and standard deviation for each group
- the t statistic
- the df
- the observed p-value (remember, this is a one-tailed hypothesis test)
- indicate what the significance test tell you. (4 pts total)
A researcher is interested to see if a mentoring program impacts student retention. He compares retention rates for students who were and were not mentored. To examine this, he conducts a Chi Square test. The SPSS output is shown below:
- What is the research hypothesis (note how the problem is worded to indicate if it is one or two tailed)? (1 pt)
- Write up the results of the Chi Square results in full APA format. Remember, this means that you should include the following:
- the chi square statistic
- the df
- the observed p-value (remember, this is a one-tailed hypothesis test)
Be sure to indicate what the significance test tells you. (2 pts total)
