Question

1. which of the following describes a potential source of bias in an experiment? a) a scientist measuring plant height records taller measurements because they expect fertilizer to work b) plants are randomly assigned to treatment groups c) all plants are given the same amount of water d) a control group is used for comparison 4. what is the purpose of a control group in an experiment? a) to provide a baseline for comparison

Explanation:

3.

Larger sample sizes reduce the impact of outliers and random variations, minimizing bias. Smaller experiments are more prone to the influence of such anomalies.

A control group in an experiment serves as a baseline. It is not exposed to the treatment being tested, allowing for comparison to see the true effect of the treatment.

Answer:

c) Study B, because larger sample sizes reduce the effect of outliers

4.