Margin of Error

Margin of Error

What is Margin of Error?

​Instead we use Percentage

​Similar to Absolute Value Word Problems

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

Practice Problem

​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?

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