Exploring Sampling Methods
Presentation
•
Mathematics
•
7th Grade
•
Hard
Joseph Anderson
FREE Resource
5 Slides • 16 Questions
1
Math 7
Samples & Populations Quiz #2 Review
2
Multiple Choice
I stood in front of VONS and asked everyone who entered what their favorite candy bar is. What kind of sampling methods did I use?
Convenience Sampling
Systematic Sampling
Voluntary-Response Sampling
Random Sampling
3
I stood in front of VONS and asked everyone who entered what their favorite candy bar is. What kind of sampling methods did I use?
This would likely be considered to be convenience sampling because it was CONVENIENT for me to gather data this way. This data is not necessarily representative of the community at large....just those that shop at VONS at 10AM on a Saturday.
4
Multiple Choice
I pulled popsicle sticks on my phone to get three students to represent us at Principal's Cabinet. What kind of sampling is this?
Convenience Sampling
Systematic Sampling
Voluntary-Response Sampling
Random Sampling
5
Multiple Choice
I pulled popsicle sticks to get three students to represent us at Principal's Cabinet. If all homeroom teachers use this method, will Principal's cabinet be a good representation of the entire school population?
Yes
No
6
Multiple Choice
I made a survey available on my Canvas page for any students wanting to fill out a survey about homework time. What kind of sampling is this?
Convenience Sampling
Systematic Sampling
Voluntary-Response Sampling
Random Sampling
7
Multiple Choice
I made a survey available on my Canvas page for any students wanting to fill out a survey about homework time. If all teachers use this method, will it be a good representation of the entire school population?
Yes
No
8
Multiple Choice
I stood in front of school and surveyed every 10th student who entered through the gate. What kind of sampling is this?
Convenience Sampling
Systematic Sampling
Voluntary-Response Sampling
Random Sampling
9
Multiple Choice
I stood in front of school and surveyed every 10th student who entered through the gate. Is this a good representation of our entire school population?
Yes
No
10
Multiple Choice
If I had a population of 1000 people, about how many people surveyed would be a representative sample?
10 - 20 people
800 - 900 people
1000 people
250 - 300 people
11
Remember that a good, representative sample is about 25-30% of your population.
If I have 1,000 people, I want to multiply that 1,000 by 25% and 30% to find the range.
1000 x 25% = 1000 x .25 = 250
1000 x 30% = 1000 x .30 = 300
Somewhere around 250-300 people would be a good, representative sample of your population.
12
Multiple Choice
If I had a population of 30,000 people, about how many people surveyed would be a representative sample?
30,000 people
100 - 250 people
7,500 - 9,000 people
18,000 - 13, 500 people
13
Fill in the Blanks
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15
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16
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17
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18
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19
Draw
Make a box-and-whisker plot of the data:
10, 11, 14, 4, 8, 12, 14, 15, 12, 10
20
Here is my "oh-so-beautiful" box-and-whisker plot. Remember, there are FIVE points that are important:
Minimum
Q1
Q2/Median
Q3
Maximum
21
You're awesome, 7th Graders!!
Math 7
Samples & Populations Quiz #2 Review
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