WorksheetsBiased v Unbiased Samples
Total questions: 15
Worksheet time: 8mins
Which is the population?
an entire deck of cards
five heart cards
Which is the sample?
blank NY state
Red area on NY state
Which is the population?
the jar
the ones outside the jar
A restaurant would like to evaluate the efficiency of its workers, so they observe the workers during the second shift. Is this a biased or un biased sample?
(a)
An airport randomly selects inspects every 8th suitcase that goes through security.
Unbiased
Biased
To determine how many students plan to attend the school musical, Maria surveys 100 random people in the hallway.
Biased
Unbiased
To determine how many homes in his neighborhood plan to hand out candy on Halloween, Daniel chooses one street at random and surveys each household on that street.
Biased
Unbiased
At the end of the year, a math teacher decides to survey his students to determine what they liked best about his class. He uses his first period class as his sample.
Unbiased
Biased
To check lightbulbs for defects, 500 random bulbs from a certain production line are checked.
Unbiased
Biased
A total of 125 people were surveyed at the bake shop. What percent reported pumpkin pie as their favorite?
6.4%
80%
12%
20%
A total of 125 people were surveyed at the bake shop. What percent reported pecan pie as their favorite?
6.4%
80%
12%
20%
A total of 125 people were surveyed at the bake shop. Out of 600 people, how many would you expect to say their favorite pie is apple or blueberry?
811
47
117
235
To get valid results, a sample must be...
biased
unbiased
