Margin of Error
Presentation
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Medium
Standards-aligned
Jennifer Kay
Used 23+ times
FREE Resource
3 Slides • 4 Questions
1
2
Instead we use Percentage
Similar to Absolute Value Word Problems
3
Match
Match the following Percent to its corresponding Decimal
52.3%
5.23%
50%
0.523%
5%
0.523
0.0523
0.5
0.00523
0.05
0.523
0.0523
0.5
0.00523
0.05
4
Let's see how this looks in a word problem
According to a survey, 52% of female high school students work at an after-school job. The survey had a margin of error of ±2.3%. Of the estimated 14,353 female high schoolers in Jacksonville, how many work an after school job?
5
Multiple Select
The first step in solving a MOE (margin of error) problem is to convert your percentages to decimals and find your 2 new percentages.
You do this by taking your TOTAL percent (52% of females) and adding/subtracting the MOE (±2.3%).
What are the 2 new decimal numbers you have computed?
49.7
0.497
54.3
0.543
6
Fill in the Blanks
Now take your TOTAL (14,343 female students) and MULTIPLY by the MOE decimals you computed in the last slide (0.497 and 0.543)
What is the range of female students that have an after school job?
Type your answer from least - greatest.
7
Fill in the Blanks
According to a survey, 12.3% of men over the age of 30 in Duval County work two or more jobs. The survey had a margin of error of −+ 1.9%. Of the estimated 35,000 men over the age of 30 in Duval, how many would you expect to work two or more jobs?
Write your answer least to greatest
Show answer
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