

Comparative Inferences- Populations
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Medium
+3
Standards-aligned
Jordan Copenhaver
Used 44+ times
FREE Resource
12 Slides • 10 Questions
1
Comparative Inferences- Populations

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Example 1
Quinn collects data from a random sample of 20 seventh grade students in a fitness program. She compares the number of curl ups from last year to this year. What can she infer from her comparison?
3
Step 1- Display Data in a dot plot
4
Multiple Choice
What do the dots in the dot plot represent?
Each dot is one student
The number of curl ups
5
Step 2- Use the dot plot to compare
6
Multiple Choice
What is the range of data set?
5
7
4
7
Multiple Choice
What is mode?
Middle number
The average of the data
The most common number
8
Multiple Choice
What is the mode of this data?
23
24
20
9
Let's Review
The range is 7
The mode is 24
10
Now, let's look at the next set of data...
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Multiple Choice
What is the range of the data?
9
7
3
12
Multiple Choice
What is the mode of the data?
28
24
27
13
Let's compare
What can we infer?
14
Multiple Choice
What would be a good inference based on our data?
Most students were able to do LESS curl ups this year.
Most students were able to do MORE curl ups this year.
There is not enough data.
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Now you try!
What inference can you make about the number of pushups?
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Open Ended
Type your inference based off of the dot plot
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MAD
Mean of the distances of each value from the mean of the data set
Find how far each data point is from mean, add together and divide by data points
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MAD for Curl Ups
Which set has a greater MAD?
Curl Ups this year
What does that tell us?
Not all students made the same progress- more variation in the data
19
Use stats to make a prediction!
Quinn's classmate tells her the number of curl ups he completed this year and last.
He did not tell Quinn which year was which
20
Multiple Choice
Based on what we know about the curl ups, what number of curl ups did he complete THIS year?
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23
21
Open Ended
Use the data from the chart. Calculate the mean for week 1 and week 2. Type your answer like this.... Week 1 mean=.... Week 2 mean=....
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What inference can we make about the team from our data?
Comparative Inferences- Populations

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