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Data Session 9, Part B: Selecting the Sample
 
Session 9 Part A Part B Part C Part D Homework
 
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Session 9, Part B:
Selecting the Sample

In This Part: Fair Sampling | A Fair Sampling Method | Variation in Estimates

A computer can perform random sampling and estimation much more quickly than you can by hand. Here are three more random samples of 10 sub-regions generated by a computer.

 

Sample 1

Sample 2

Sample 3

Sub-region 1

6

3

5

Sub-region 2

7

3

4

Sub-region 3

6

5

4

Sub-region 4

5

6

5

Sub-region 5

8

7

2

Sub-region 6

7

3

4

Sub-region 7

7

4

3

Sub-region 8

8

7

7

Sub-region 9

5

2

4

Sub-region 10

8

4

5

Sample Total

67

44

43

Sample Average

67 / 10 = 6.7

44 / 10 = 4.4

43 / 10 = 4.3

Total Estimate

6.7 x 100 = 670

4.4 x 100 = 440

4.3 x 100 = 430

 

Problem B5

Solution  

Record your estimates in the following table:

Sample

Estimate

 First Sample

450

 Problem B3

 Activity Sample 1

 Activity Sample 2

 Activity Sample 3

Based on these five estimates, how many penguins do you think there are in the entire region?

Next > Part C: Investigating Variation in Estimates

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