# hw 3 – histogram 21 of 22

Learning Goal: I’m working on a statistics question and need an explanation and answer to help me learn.

## Progress Check

Use this activity to assess whether you and your peers can:

• Use histograms to compare shape, center, and spread in the distribution of a quantitative variable for two groups of individuals.

## Context

Students researching backpack weights gathered data from 45 elementary school children in the 3rd and 5th grades. The variable is “percent of body weight carried in the school backpack.” So a child who weighs 60 pounds and carries 9 pounds has a variable value of 15% (9 ÷ 60 = 0.15 = 15%). The American Chiropractic Association (ACA) recommends that children carry no more than 10% of their body weight.

## Prompt

When we analyze backpack weight as a percentage of body weight, how do 3rd and 5th graders compare? Are children in this study following the ACA recommendation?

Percent of Body Weight Carried
% of body weight carried in backpack Third
Fifth
0-5% 1 1
5-10% 6 6
10-15% 11 4
15-20% 3 7
20-25% 0 1
25-30% 0 2
30-35% 0 1
Totals 21 22

Note: Left-hand end-points are included in each bin. So the 2nd bin contains students carrying 5% of their body weight.

## Module 7 Discussion Board

Use the Module 7 discussion board (opens in a new tab) to ask questions or provide feedback about the problems in any Module 7 activity – including this peer-reviewed assignment.

## Review Feedback

• Peer feedback should be available before final drafts are due.
• Instructor feedback is only available after an assignment is graded.
• Use these directions (opens in a new tab) to learn how to review feedback.

Click the “Next” or > button to continue.

Content by Cuyamaca College math faculty and licensed under the Creative Commons 4.0 International License (Links to an external site.).

## Rubric

Peer Review (FD Optional)

Peer Review (FD Optional)

Criteria Ratings Pts
This criterion is linked to a Learning OutcomeFirst Attempt
 5 ptsFull Marks A first attempt was made on this assignment 0 ptsNo Marks
5 pts
 3 ptsFull Credit All parts of the “Prompt” are addressed, and the responses demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. The answers are mostly correct. The writing/work is clear. The explanation/work is reasonable, well-organized, and easy to follow. 1.5 ptsPartial Credit One or more parts of the “Prompt” are not addressed or are incorrect. Or, answers do not demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. Or, answers are correct, but the writing/work is unclear, incorrect, or difficult to follow. 0 ptsNo Marks The “Prompt” is not addressed or the work is incorrect or missing. Or, the first draft was not a good-faith effort.
3 pts
This criterion is linked to a Learning OutcomePeer Review
2 pts
Total Points: 10

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