Which Is True About Randomized Experiments

question 187

Multiple Choice

Which is true about randomized experiments?
I. Randomization reduces the effects of confounding variables.
II. Random assignment of treatments allows results to be generalized to the larger population.
III. Blocking can be used to reduce the within-treatment variability.

• A) I only
• B) I, II, and III
• C) II only
• D) III only
• E) I and III

---

Definitions:

Ratio Data

A type of quantitative data that not only measures the magnitude but also allows for the comparison of differences and the calculation of ratios, having an absolute zero point.

Categorical Data

Data that can be categorized into groups or categories that are mutually exclusive, without any natural ordering.

Obtaining

The act of acquiring or getting something through effort or request.

VLOOKUP

A function in spreadsheet programs that searches for a value in the first column of a table and returns a value in the same row from a specified column.