Population and Sample

Population and Sample

Multiple Select

Check which of the following tasks where sampling would be necessary.

• To survey the favorite ice-cream flavors of the students in class.

• To survey the weights of the squirrels in a state park.

• To survey the test grades among the sixth graders of an entire state in a state test.

Open Ended

Ron is a gymnast in the school team. His math assignment is to find the mean height of the male athletes in his school. Ron asks five of his team mates for their heights and calculates the mean. Is Ron's sample as good sample? Why or why not?

Multiple Choice

Min's science assignment is to find out the blood groups of people in his town. He asks his classmates for the blood groups of their family members. Is Min's sample a random sample?

• Yes

• No

Open Ended

Min's science assignment is to find out the blood groups of people in his town. He asks his classmates for the blood groups of their family members. Is Min's sample a good sample? Why or why not?

Open Ended

Identify the population and propose how a sample could be chosen to best complete the task:

To find the mean allowance of all sixth graders in a 800-student school.

Open Ended

Identify the population and propose how a sample could be chosen to best complete the task:

To find the mean weight of codfish in the Pacific Ocean.

Open Ended

Identify the population and propose how a sample could be chosen to best complete the task:

To find the mean amount spent on lunch at a fast food restaurant.

Open Ended

The top table shows how the student population at Amos's school can be classified according to origin.

Amos's social studies assignment is to find out where the students in his school mostly originated from.

For his assignment, he picks a random sample of 50 students from the school registry, interviews the students in the sample about their origin and presents the results using a pie chart.

Explain if Amos's sample is a good one. What math did you use?

Multiple Choice

The picture shows the people living in a building of an apartment complex and their ages (in years).

Alan wants to find the mean age of the people in the O'Hare family. He asks for everyone's age in the family to find the mean age of the people in the O'Hare family.

Is Alan using a sample, if so what type of sample is he using?

• He is not using a sample.

• He is using a convenient sample.

• He is using a random sample.

Multiple Choice

The picture shows the people living in a building of an apartment complex and their ages (in years).

Barry wants to find the mean age of the people living in that building. He asks the people he knows in the building for their ages in order to find the mean of the people living in that building of the apartment complex.

Is Barry using a sample, if so what type of sample is he using?

• He is not using a sample.

• He is using a convenient sample.

• He is using a random sample.

Open Ended

The picture shows the people living in a building of an apartment complex and their ages (in years).

Carey wants a random sample to find the mean age of the people living in that building of the apartment complex. Suggest what she should do.

Multiple Select

Check which sets of data would best be obtained by measuring:

• Heights of people

• Weights of people

• Number of pets one keeps

• Place of orgin

• Distance between 2 places

Multiple Select

Check which sets of data would best be obtained by carrying out a survey:

• Number of family members

• Weights of people

• Number of pets one keeps

• Place of orgin

• Distance between 2 places