Data

Question 1

What are the three measures of central tendency?

Answer 1

Mean, mode and median.

Question 2

What is interval level data?

Answer 2

Measurement on a scale where the difference, the intervals, between the points on the scale are the same.

Example: response time, accuracy scores, exam results

Question 3

What is ordinal level data?

Answer 3

Measurement on a scale that allows data to be put in an order (or numerically ranked) but where the difference between points are not necessarily equivalent.

Example: low/medium/high agree/disagree never/rarely/sometimes/always/often

Question 4

What is nominal level data?

Answer 4

Measurement that involves naming an attribute of the participants or their responses.

Example: categories or classifications (gender, ethnicity, membership)

Question 5

What is calculated by looking at how far away every single data point falls in relation to the mean of a data set?

Answer 5

Standard deviation

Question 6

What is the interquartile range?

Answer 6

The range of data between the lower and upper quantiles. It considers the range excluding the most extreme values.

Question 7

Means and standard deviation are the most appropriate descriptive stats to report for which level of measurement?

Answer 7

Interval data.

Question 8

Which descriptive stats are most appropriate to report interval data?

Answer 8

Means and standard deviation.