Question

Suppose that the following data were obtained from a similar independent-measures research study comparing three treatment conditions. The data are as follows:

1. Treatment A: Mean = 45, Variance = 16
2. Treatment B: Mean = 50, Variance = 25
3. Treatment C: Mean = 55, Variance = 36
What can be inferred from this data?

A) Treatment A has the highest mean.
B) Treatment B has the lowest variance.
C) Treatment C has the highest variance.
D) Treatment A has the lowest mean.

Answer 1

Based on the given data, Treatment C has the highest variance with a value of 36, and Treatment A has the lowest mean with a value of 45.

Step-by-step explanation:

From the data provided about the independent-measures research study comparing three treatment conditions, we can infer the following:

• Treatment C has the highest variance, which is indicated by the variance value of 36.
• Treatment B has a variance of 25, which is not the lowest; therefore, it does not have the lowest variance.
• Treatment A has the lowest mean, as suggested by a mean of 45 compared with the means of the other two treatments.
• Treatment A does not have the highest mean; instead, it is the lowest when comparing the three means.

The correct answer to what can be inferred from this data is: C) Treatment C has the highest variance and D) Treatment A has the lowest mean.