Population and Sample

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?

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?

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.

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.

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.

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?

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.