Populations + Samples

When information is being gathered about a group, the entire group of objects, individuals, or events is called the _________________________________.

• population

• sample

• variable

• parameter

A __________________________ is part of the population that is chosen to represent the entire group.

• sample

• variable

• mean

• parameter

The sample that is chosen should be representative of the entire population. A sample in which every object, individual, or event has an equal chance of being selected is a _____________________________________________.

If a sample does not accurately represent the entire population, it is called a _________________________________.

• biased sample

• random sample

• representative sample

• unbiased sample

For the following situation, identify the population. Then, determine whether the sample is a random sample or a biased sample. Nora wants to know the favorite movie genre of people in her hometown. She surveys 50 people leaving the theater after the 8pm showing of a comedy film. What type of sample is this?

• Random sample

• Biased sample

• Stratified sample

• Systematic sample

For the following situation, identify the population. Then, determine whether each sample is a random sample or a biased sample. Explain. Mr. Juniper is a teacher and wants to know the favorite type of ice cream for students in his classes. He puts the names of his students in a hat, draws 6 names of students in each class, and surveys them. What is the population, and is the sample random or biased?

• The population is all students in Mr. Juniper's classes, and the sample is random.

• The population is all students in the school, and the sample is biased.

• The population is the 6 students chosen, and the sample is random.

• The population is all teachers in the school, and the sample is biased.

For the following situation, identify the population. Then, determine whether each sample is a random sample or a biased sample. Explain. The little league baseball director, Leroy, wants to know when the preferred practice nights are for all athletes in the league. He decided to ask all players whose last name started with A through M. What is the population, and is the sample random or biased?

• The population is all athletes in the league; the sample is random.

• The population is all athletes in the league; the sample is biased.

• The population is players with last names A through M; the sample is random.

• The population is players with last names A through M; the sample is biased.

For the following situation, identify the population. Then, determine whether the sample is a random sample or a biased sample. Kaydence wants to find out the favorite sport of students at his school. He surveyed every fifth student that walked into the football game on Friday night. What is the population, and is the sample random or biased?

• The population is all students at the school, and the sample is random.

• The population is all students at the school, and the sample is biased.

• The population is students at the football game, and the sample is random.

• The population is students at the football game, and the sample is biased.

For the following situation, identify the population. Then, determine whether the sample is a random sample or a biased sample. Alyn wanted to find out how much the average household in his town spends on groceries each week. At football practice, he surveyed 15 of his teammates. What is the population and is the sample random or biased?

• The population is all households in the town; the sample is random.

• The population is all households in the town; the sample is biased.

• The population is Alyn's teammates; the sample is random.

• The population is Alyn's teammates; the sample is biased.

Write a survey that would be random.

• Create a random survey

• Write a fixed survey

• Write a detailed report

• Write a summary