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Exercise 17

Avg difficulty 2.5

Identify whether each situation describes an observational study or an experiment.

  1. Subjects are asked to do 20 jumping jacks, and then their heart rates are measured.

  2. Twenty coffee drinkers and twenty tea drinkers are given a concentration test.

  3. The weights of potato chip bags are weighed on the production line before they are put into boxes.

Lee et al., Math in Society, §3.1 Overview of the Statistical Process, Exercise 17

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Adapted from Math in Society © 2018–2024 Portland Community College Math Instructors. Licensed under CC BY-SA 4.0. Source: Math in Society. Imported at revision 68ee43c.