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Population or Sample
Random Samples
Word Problems
Test Quest
100
Bob is performing a survey to figure out what his schools favorite ice cream flavor. There are 600 students total in his school, but he only surveys the people in all his classes. What is the population?
600 is the population
100
The randomly selected 45 students in the lunchroom.Adam has to complete a survey for band. He has to ask people what there favorite instruments are. He ramdomly selects 45 students in the lunchroom. What is the random sample?
The random sample is the 45 students in the lunchroom.
100

Adam has to complete a survey for band. He has to ask people what there favorite instruments are. He ramdomly selects 45 students in the lunchroom. Adam believes that this survey is biased. True or false.

False because he randomly selected the students so it could have been anyone.

100

Sample or population?

Maddy is going to email a survey to all the teachers in the school.

Population

200

Jack has to complete a survey for school. He asks all 35 students in his 1st period. What is the sample?

35 students

200
Daniel is asked to do a survey for science. There are 432 students in total at the school, so he can't ask everyone. Instead he asks 50 randomly selected people in the lunchroom. What is the random sample?
The random sample is 50 students in the lunchroom.
200

Gina is making a survey for social studies. She asks all 92 students in the lunchroom out of the 812 total. She believes that her selection is unbiased. True or false.

False

200

In a sample 5 of 800 T-shirts were defective. Based on this sample, in a production run of 240,000 T-shirts, how many would you expect to be defective?

1500

300
Jimmy is gathering answers for a survey. He asked everyone in his classes which is half of the total of 300 students in the whole school. What is the population?
300 students
300

______ is a sample in which each member of the population has a random chance of being chosen. 

Random sample

300

A seventh-grade student chooses a random sample of 50 out of 400 students. He finds that 7 students have traveled outside the United States. The student claims that over 50 of the 400 students have likely traveled outside the United States. Is the student correct? Explain.

Yes, 50 x 8 is 400 and 7 x 8 is 56

300

A pizza store surveyed a random sample of 60 trinity food festival attendees about their favorite type of pizza. 30  of them said that the sausage pizza is their favorite. There are a total of 1600 attendees. Find a reasonable estimate.

800

400

Tiffany is conducting a survey on peoples favorite fruit. She asks people in her school of 400 total students. She asks 23 at lunch then she asks 12 in her next class. What is the sample?

35

400
Sara is preparing a survey. She asks all 19 people in her social studies class. Is her selection random or not?
No it is not because she just asked all the people in her social studies class.
400

Kayla is conducting a survey on favorite colors. She asks only the people in her 4th period. She believes that her selection is biased. True or false.

True because the only people that were able to be in the survey was the people in her 4th period.

400

A metal-fabricating company produces 150,000 souvenir tokens each year. In a random sample of 400 tokens, 3 have stamping errors. What is the percent of stamping errors? Round to the nearest hundredth.

.75%

500
Rachel is doing a survey. She asks 50 of the students in the school out of the 340 total students. What is the population?
340 students
500
Seth is completing a survey. He asks 27 random people in the parking lot. Is his selection random?
Yes because any of the people in the parking lot could have been chosen.
500

A survey of 200 students in seventh-grade classes shows that 35% are happy with school lunches. How many are happy with school lunches?

70

500

Rylie randomly surveys 7th graders in his school and finds that 6 out of 30 attends summer camp. If there are 200 students, how many are expected to attend camp?

40