A researcher is examining the effect of wake-up time on alertness. Ten people wake up at 5am on Day 1, and rate how alert they feel from 1 – 10, with 10 being very alert. The next day, they wake up at...

A researcher is examining the effect of wake-up time on alertness. Ten people wake up at 5am on Day 1, and rate how alert they feel from 1 – 10, with 10 being very alert. The next day, they wake up at 10am and rate how alert they feel from 1 – 10. Given the following output, are there significant differences in alertness between a 5am and 10am wake-up? Which test would you be doing?

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