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?

Module 7 Homework 2 – Histograms: Comparing Two Distributions (21 of 22)

Start Assignment

Due Sunday by 11:59pm

Points 10

Submitting a text entry box or a file upload

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.

Directions

Use the drop-down menu to learn about the three steps needed to complete this assignment.

Three steps to complete the assignment

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

graders Fifth

graders

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.

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Rubric

Formative Assessments

Formative Assessments

Criteria Ratings Pts

This criterion is linked to a Learning OutcomeAnswering the Prompt

10 pts

Full Credit

The first submission demonstrates a good-faith effort to address each part of the Prompt. Either in the first draft or the optional final draft, 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 correct. The writing/work is clear. The explanation/work is reasonable, well-organized, and easy to follow.

8.5 pts

Mostly Correct

The first submission demonstrates a good-faith effort to address most of the Prompt. In the optional final draft 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.

6 pts

One or more incorrect

The first submission demonstrates a good-faith effort to respond to a smaller portion of the Prompt. In the first draft or the optional final draft, 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 pts

No Marks

The first submission does not demonstrate a good-faith effort to address the Prompt.

10 pts

Total Points: 10

Requirements: 1 p