Level of measurement + central tendency

The interquartile range is not a dispersion measure

A survey asks people to pick their favourite social-media app. Which “average” should you report?

Reaction times (ms) are normally distributed with no outliers. Which measure best shows the centre?

What is a dispersion measure?

Time taken (in seconds) to finish a maze is which level?

Essay scores (0–20) are mildly skewed right but have no extreme outliers. Which measure is usually safest in this case?

The median is not a dispersion measure.

Can you by looking at descriptive stats tell whether the results are significant?

Blood types (A, B, AB, O) are an example of which level of measurement?

Temperature in degrees Celsius (°C) is best labelled as:

A teacher ranks students 1st, 2nd, 3rd in a spelling bee. Which level is this?