2. A scientist is studying the effect of exercise on blood pressure. He studie 20 people who exercise 5 hours per week and 20 people who do not exercise. He compares the blood pressures of the two groups at the beginning and after three months. This is an example of a(n): Answer choices: sample survey. observational study. experiment.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 19SGR
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2. A scientist is studying the effect of
exercise on blood pressure. He studies
20 people who exercise 5 hours per
week and 20 people who do not
exercise. He compares the blood
pressures of the two groups at the
beginning and after three months.
This is an example of a(n):
Answer choices:
sample survey.
observational study.
experiment.
Transcribed Image Text:2. A scientist is studying the effect of exercise on blood pressure. He studies 20 people who exercise 5 hours per week and 20 people who do not exercise. He compares the blood pressures of the two groups at the beginning and after three months. This is an example of a(n): Answer choices: sample survey. observational study. experiment.
1. A scientist is studying the effect of
exercise on blood pressure. He studies
50 people who exercise regularly to find
out whether their blood pressures are
low, average, or high.
This is an example of a(n):
Answer choices:
sample survey.
observational study.
experiment.
Transcribed Image Text:1. A scientist is studying the effect of exercise on blood pressure. He studies 50 people who exercise regularly to find out whether their blood pressures are low, average, or high. This is an example of a(n): Answer choices: sample survey. observational study. experiment.
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