Below is a 9 question quiz (a ‘quizlet’, if you like) to help you to familiarise yourself with all of these confusing new terms that we have introduced. Click VIEW FEEDBACK when you’re ready to see the answers. When you want to move on just click EXIT QUIZ. Enjoy!

1. A representative sample of 50 students is taken from a school. Of these students 32 state that they plan to attend university in the future. In the school as a whole, what % of students do you predict would wish to attend university?

2. Take a look at the following crosstabulation. It shows the relationship between whether a student receives a minimum of 5 A*-C grades at age 16 (fiveem) and whether or not they are eligible to receive free school meals from the government (FSM):Which of the following statements are true (click all that apply)?

More students are eligible for FSM than are not. More students do not achieve at least 5 A*-C grades than do. Those who are eligible for FSM are less likely to achieve at least 5 A*-C grades than those who are. Students who achieve 5 A*-C grades are approximately twice as likely to be eligible for FSM as not to be eligible. Students eligible for FSM are roughly 3 times more likely to fail to achieve 5 A*-C grades than to succeed.

3. Four equally matched horses (A-D) run in a race. Supposing that all horses are equally likely to win, what is the probability that horse A will be victorious?

1 out of 2 (0.5) 1 out of 4 (0.25) 1 out of 1 (1)

4. Continuing with our equestrian theme, what are the odds that the aforementioned horse A will win?

1/4 (.25) 1/3 (.33) 1/2 (0.5)

5. The probability of a student in a statistics class passing a horrible test is 0.75. What are the odds of a student passing this test compared to not passing the test?

3:4 3:1 1:3 4:3 1:1

6. The following statements are about logits and odds ratios. Drag each statement under the correct category.

Statement

Logits

Odds Ratio

Symetrical around '0'

Sign (+ or -) dependent on 'base' category

Linear relationship with the explanatory variables

Change in odds of outcome associated with a one unit change in explanatory variable

Minimum value of 0

7. What does the exponent of the regression coefficient, Exp(B), represent in a logistic regression model?

The logged odds The model constant The odds ratio

8. A class of 30 children take a maths test and 17 of the children pass. The odds of passing are therefore 17/13 or 1.31. Based on these odds, what is the probability of passing the test?You might want to use a calculator!

9. Suppose that in our sample, following a logistic regression analysis, the odds for girls of having a positive attitude to school were 1.25. What proportion of girls would be expected to have a positive attitude?

25% 55% 75%

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VIEW FEEDBACKwhen you’re ready to see the answers. When you want to move on just clickEXIT QUIZ. Enjoy!