Solution to A study is designed to test the effect of light level on exam performance of … - Sikademy

July 24, 2021

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Archangel Macsika

A study is designed to test the effect of light level on exam performance of students. The researcher believes that light levels might have different effects on males and females, so wants to make sure both are equally represented in each treatment. The treatments are fluorescent overhead lighting, yellow overhead lighting, no overhead lighting (only desk lamps).

Solution

a) What is the response variable?

Exam performance.

b) What is the explanatory variable? What are its levels?

Light level.

The levels are fluorescent, overhead lighting, yellow overhead lighting, no overhead lighting (only desk lamps).

c) What is the blocking variable? What are its levels?

The blocking variable is sex (male or female).

The levels are male and female.