How might you assess time spent studying using nominal, ordinal, AND interval measures? (This should be three different ways, one for each level of measurement)

Explain the difference between raw scores and percentiles (i.e., what information do we get from each)?

The following is the formula for calculating the standard deviation:

What does the standard deviation tell us?

Why do we use d² as opposed to d?

Why do we use N - 1 as opposed to N?

The following are data on attitudes towards illegal immigrants collected using a feeling thermometera 0 to 100 scale where 0 = entirely negative attitudes and 100 = entirely positive attitudes. 10, 5, 20, 35, 0, 70, 15, 5, 15, 25, 45, 15

Calculate the three measure of central tendency for these data.