Research Methods AQA Assessment

Question 1

In order for results to be significant, the observed value should be…

Answer 1

equal to or less than the critical value.

Question 2

the sentence to use after finishing a sign test:

Answer 2

The observed value S = ? is (not) significant at the 0.05 level for a one/two-tailed hypothesis where N = ?
Therefore, we must ? the null hypothesis and ? the alternate hypothesis.

Question 3

The sign test is used with…

Answer 3

nominal data, repeated measures design and a test of difference

Question 4

extraneous variables are…

Answer 4

any factors other than the IV that, if not accounted for, could negatively affect or confound the data collected.

Question 5

extraneous variables potentially prevent…

Answer 5

researchers from finding a direct causal effect between the manipulated IV and measured DV. This weakens the internal validity of the study.

Question 6

how to find out percentages and degrees in a pie chart:

Answer 6

1) add numbers together for total 2) divide each category by the total 3) multiply each decimal by 100 for % / multiply by 360 for degrees

Question 7

when to use different measures of central tendency:

Answer 7

mean = interval
median = ordinal
mode = nominal