Question

List two variables that you could study the relationship between using an independent groups t-test. for each variable, indicate if the variable is (1) the IV or DV, (2) nominal, ordinal, interval, or ratio, and (3) the values of each variable.

Answer 1

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In our sample example,  students reported their typical time to run a mile, and whether or not they were an athlete. Suppose we want to know if the average time to run a mile is different for athletes versus non-athletes. This involves testing whether the sample means for mile time among athletes and non-athletes in your sample are statistically different (and by extension, inferring whether the means for mile times in the population are significantly different between these two groups). You can use an Independent Samples t Test to compare the mean mile time for athletes and non-athletes.

In this scenrio:

1 .

IV = The factor : whether person was a athlete or not a athelete

DV: The time required to run a mile

2 .

The variable is of the type RATIO

3. Values of each variable :

Athelete Not Athelete

2 3

4 4.8

2 3.4

3.4 2.1

1.4 3.1

3.2 4.5

2.8 4.2

2.5 6.3