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WorksheetsUsing Sampling to Predict
Total questions: 9
Worksheet time: 30mins
Simple, stratified, and systematic random samples are examples of ...
unbiased sample
biased sample
Convenience sample and voluntary response sample are examples of ...
unbiased sample
biased sample
To determine if my students like Math, I surveyed every 3rd student that walked into my classroom. Identify the sample as biased or unbiased.
unbiased sample
biased sample
To determine how many students at Shull would attend the dance, the principal surveyed the students in Ms. Miller's math class. 10 students said they would attend and 15 said they would not attend. It can be concluded that half the students at Shull will attend the dance. Is this conclusion valid? Why?
Yes, this is a simple random sample. So the sample is unbiased.
No, this is a convenience sample. So the sample is unbiased.
No, this is a voluntary response sample. So the sample is biased.
No, this is a convenience sample. So the sample is biased.
The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Is this an unbiased sample? If yes, suppose there are 684 students at the school. How many can be expected to prefer E-mail?
No, it's a biased sample
432
304
16
A sample of the Ben & Jerry's employees took a survey on their favorite flavor of ice cream. The table shows how many employees voted for each flavor. What is the probability that an employee voted for Cookies and Cream?
35 / 125
35 / 730
35 / 19
14 / 35
94
104
204
224
12,200
1,300
13,100
13,200
Determine if the conclusion is valid.
A random sample of people at the mall shows that 22 prefer to take a family trip by car, 18 prefer to travel by plane, and 4 prefer to travel by bus. Is this sample method valid? If so, how many people out of 500 would you expect to say they prefer to travel by plane?
Bus = 9%
Plane = 41%
Car = 50%
The conclusion is valid, about 200 people
The conclusion is not valid
The conclusion is valid, about 205 people
The conclusion is valid, about 250 people
