Question

question 4 of 25
which option is an example of an experiment?
a. testing the effectiveness of a new reading program by allowing a classroom to use it and comparing the results with another classroom that doesnt use it
b. asking students in a school how much time they spend exercising
c. measuring the heights of the players on the basketball team
d. randomly choosing 100 customers and asking them to fill out a questionnaire about the quality of service they received

Explanation:

An experiment involves manipulating an independent variable (here, using the new reading program) and comparing results between an experimental group (uses the program) and a control group (does not use it). Options B, C, and D are observational or survey-based, not experimental.

Answer:

A. Testing the effectiveness of a new reading program by allowing a classroom to use it and comparing the results with another classroom that doesn't use it