Question

17. A psychologist wants to test if men and women report different political attitudes. A sample of 15 men and a sample of 15 women are obtained. Each participant completes a measure of political liberalism, with higher scores representing more liberal political attitudes. The data are as follows:

   Men                          Women .

mean = 36                 mean = 37

SS = 210                   SS = 250

1. State the hypotheses (i) formally with symbols and (ii) in words explain what the hypotheses predict in terms of the independent and dependent variables.
2. Sketch the distribution and locate the critical region.
3. Compute the test statistic.
4. Make a decision THREE WAYS: (i) Make a decision regarding H₀ (ii) State the results formally, using symbols and statistical jargon (iii) State the results in jargon-free, regular English -- what would you tell your grandmother?
5. Calculate the effect size (Cohen’s d)
6. Construct a 95% Confidence Interval for the unknown population parameter.

**** remember: Talk about DIFFERENCS not effects *********

Answer 1