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4. What sampling strategy does
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use? What issues arise from the sampling
strategy used to collect the data on this site?
H
ardest Problem
How hard
can
it be? Can you still use what you’ve learned?
Using the information that you have learned regarding sampling strategies, choose a research question,
then using the methodology, discuss in detail your sampling strategy to obtain the data to answer your
research question.
What are the conditions and parameters that make determining a sampling strategy difficult?
T
roubleshooting
Find the error and correct it!
Students in a statistics course must survey 200 students at their college to answer their research question.
The research questions and sampling strategies of two students in the course are shared below. Determine
any inherent biases in their sampling strategies and provide possible improvements.
Student 1:
Research question:
What proportion of the students at the institution use the fitness facility?
Sampling strategy:
Use a voluntary sample from students leaving the fitness facility.
Student 2:
Research question:
Is the mean number of hours studying for male students significantly different
from that of female students?
Sampling strategy:
Use a systematic random sample. The student will go to their classes and ask
every 3
rd
person to complete the survey.
M
aking it Matter
Solving problems in your life
●
What sampling strategy do you use for choosing your friends? Are there costs associated with this
strategy? Explain.
●
What are five surveys you have participated in either willingly or unwillingly? What sampling
strategies were being used?
L
earning to Learn Mathematics
Reflecting on and appreciating your learning
1. Why do we use testing (or sampling) to validate our conjectures, perceptions, or understandings?
2. What role does context play when it comes to applying mathematical knowledge?
3. How do you build confidence in your intuition with respect to sampling?
4. Why is it important that limitations are respected when using statistics?
3.4 Sampling