Exam 10: Comparing Two Means

A researcher was interested in stress levels of lecturers during lectures. She took the same group of eight lecturers and measured their anxiety (out of 15) during a normal lecture and again in a lecture in which she had paid students to be disruptive and misbehave. Based on the SPSS output, how would you interpret these results?

Which of the following would you consider to be an example of repeated-measures design?

When using the independent t-test which assumption(s) should be made?

What is important to understand about differences between variables?

In a t-test to determine whether analgesia or a placebo provide pain relief, the t-value obtained for the two-tailed probability p is found to be a low number at p = .042. What can be deduced about this result?

The value of r (the effect size) is calculated as r = .75. What does this tell you about the data?

Participants take a simulated driving test twice. In one condition they have no alcohol, in the other they have enough alcohol to take them over the legal limit. What type of design is this?

The t-test can be characterized as a regression (linear) model if

In a study of elderly experience of nursing care given at home versus nursing care given in a hospital, the following results are reported: 'Participants preferred medical care at home (M = 56, SE = 1.34) to being cared for in a hospital (M = 48, SE = 1.23). The difference is noted as t(18) = 4.40, p < .05 with an effect size of r = .72.' What does this mean in terms of the significance of the study?

Which of the following is not an example of a dummy variable?

Which of the following is an independent-measures design?

In the above study, which statement is true?

An independent t-test is used to test for

What was the dependent variable in the table below?

When might the independent t-test be used?

The t-test tests for

Which of the following is not a function of the t-test?

Which of the following is an example of a parametric test?

From the table below, indicate how many people took part in this experiment?

From the table below, did the independent variable have an effect?