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Comparing Populations - Worksheet 5 - 7th Grade

Medium

Interpret samples, tables and relationships while distinguishing observations from causal conclusions.

medium: Practice the same exercise types with a fresh numbered set.

12 problems · 20-30 minutes · Skills: statistics, data analysis, comparison

About This Worksheet

This medium-level worksheet contains 12 problems designed for 7th Grade students practicing comparing populations. Medium worksheets introduce larger numbers and varied question formats to deepen understanding and build fluency.

Read tables and graphs, count outcomes, and calculate with fractions.

  • Interpret samples, tables and relationships while distinguishing observations from causal conclusions.
  • Check your result using the method in the example before moving to the next question.

How to Solve: Worked Example

Example Problem: Two random samples have mean reading times 21 and 31 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
Solution Steps:
  1. Subtract the smaller sample mean from the larger.
Answer: 10 minutes
Tip: Check your result using the method in the example before moving to the next question.
1
Two random samples have mean reading times 19 and 29 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
2
Two random samples have mean reading times 19 and 30 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
3
Two random samples have mean reading times 24 and 29 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
4
Two random samples have mean reading times 22 and 26 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
5
Two random samples have mean reading times 17 and 28 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
6
Two random samples have mean reading times 17 and 20 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
7
Two random samples have mean reading times 22 and 31 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
8
Two random samples have mean reading times 18 and 29 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
9
Two random samples have mean reading times 22 and 28 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
10
Two random samples have mean reading times 26 and 28 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
11
Two random samples have mean reading times 27 and 32 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)
12
Two random samples have mean reading times 25 and 33 minutes. What is the difference between the sample means? (This alone does not establish a population difference.)

Answer Key

1. 10 minutes2. 11 minutes3. 5 minutes4. 4 minutes5. 11 minutes6. 3 minutes7. 9 minutes8. 11 minutes9. 6 minutes10. 2 minutes11. 5 minutes12. 8 minutes

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Frequently Asked Questions

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What skills does this probability and statistics worksheet cover?

This worksheet focuses on statistics, data analysis, comparison. It is designed for 7th Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.

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How many problems are on this worksheet?

This worksheet contains 12 problems. It typically takes 20-30 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.