7.4: Statistical tests Flashcards
In an experiment, researchers arranged for participants to complete a very personal and embarrassing questionnaire in a room with other people. Each participant was tested individually. The other people were confederates of the experimenter.
In condition 1: the confederates completed the questionnaire.
In condition 2: the confederates refused to complete the questionnaire and asked to leave the experiment.
The researchers tested 15 participants in condition 1, and 15 different participants in condition 2.
The researchers recorded the number of participants who completed the questionnaire in each condition.
In order to analyse the difference in the number of participants who completed the questionnaire in each condition, the researchers used a chi-squared test.
Apart from reference to the level of measurement, give two reasons why the researchers used the chi-squared test (2 marks)
One reason is because the design is unrelated
In an experiment, researchers arranged for participants to complete a very personal and embarrassing questionnaire in a room with other people. Each participant was tested individually. The other people were confederates of the experimenter.
In condition 1: the confederates completed the questionnaire.
In condition 2: the confederates refused to complete the questionnaire and asked to leave the experiment.
The researchers tested 15 participants in condition 1, and 15 different participants in condition 2.
The researchers recorded the number of participants who completed the questionnaire in each condition.
In order to analyse the difference in the number of participants who completed the questionnaire in each condition, the researchers used a chi-squared test.
Apart from reference to the level of measurement, give two reasons why the researchers used the chi-squared test (2 marks).
One reason is because the design is unrelated.
Another reason
Another reason is because the researcher is looking for a difference between 2 conditions
