Why is a regular average not suitable for the group of kids and the bodybuilder?

Understanding Weighted Averages Concepts

Interactive Video
•
Mathematics
•
6th - 8th Grade
•
Hard

Thomas White
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Because it only applies to groups with more than ten members.
Because it doesn't consider the number of individuals in each group.
Because it requires all weights to be the same.
Because it only works for groups of the same size.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you calculate the weighted average for a group of kids and a bodybuilder?
Add all weights and divide by the number of different weights.
Multiply each weight by the number of individuals with that weight, sum them, and divide by the total number of individuals.
Add the highest and lowest weights and divide by two.
Multiply the highest weight by the number of individuals.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the weighted average when there are more bodybuilders than kids?
It becomes exactly the average of the two weights.
It becomes closer to the weight of the bodybuilders.
It remains the same as the regular average.
It becomes closer to the weight of the kids.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the car example, why is the weighted average closer to the weight of the Lemona G?
Because the Lemona G is the most expensive model.
Because the Lemona G is the lightest model.
Because the Lemona G is the heaviest model.
Because there are more Lemona G cars than the other models.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you express a percentage as a decimal for weighted average calculations?
Move the decimal point two places to the left.
Divide the percentage by 1000.
Move the decimal point two places to the right.
Add a zero to the end of the percentage.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When using percentages for weighted averages, what is the final step?
Subtract the smallest weight from the largest.
Add all the weights together.
Divide the total weight by the number of items.
Multiply the weights by the percentages expressed as decimals.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key feature of weighted averages?
They are only used in scientific calculations.
They require all items to be the same size.
They only work with weights.
They consider the number of items in each group.
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