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?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

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

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?
Transcribed Image Text: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?
count
count
10
0
0
0-5%
5-10%
10-15%
15-20%
20-25%
25-30%
30-35%
5
Totals
5
10 15
20 25
Percent_body_weight_carried
10
% of body weight carried
in backpack
15
20
Percent_body_weight_carried
Third
graders
1
6
11
3
0
0
0
21
Third graders
30 35
Fifth graders
1
25 30 35
Fifth
graders
1
6
4
7
1
2
1
22
Transcribed Image Text:count count 10 0 0 0-5% 5-10% 10-15% 15-20% 20-25% 25-30% 30-35% 5 Totals 5 10 15 20 25 Percent_body_weight_carried 10 % of body weight carried in backpack 15 20 Percent_body_weight_carried Third graders 1 6 11 3 0 0 0 21 Third graders 30 35 Fifth graders 1 25 30 35 Fifth graders 1 6 4 7 1 2 1 22
Expert Solution
Step 1

In a continuous  variable there are n class intervals and the class mark is denoted by x with frequency f then the mean of the variable is given by

x¯=xfN where N=f

trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman