Making Inferences on Random Samples Practice

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.

Front

What is a biased sample?

Back

A biased sample is a subset of individuals that does not accurately represent the larger population, often due to non-random selection.

Front

How do you determine if a sample is random or biased?

Back

Evaluate the selection process: if every member of the population had an equal chance of being included, it is random; otherwise, it is biased.

Front

What is the sample size in a survey?

Back

The sample size is the number of individuals or observations included in the sample.

Front

What is a population in statistics?

Back

A population is the entire group of individuals or objects that is the subject of a statistical study.

Front

What is the difference between a sample and a population?

Back

A sample is a smaller group selected from a population, used to make inferences about the population.

Front

What does it mean to make inferences from a sample?

Back

Making inferences from a sample means drawing conclusions about the larger population based on the data collected from the sample.

Front

If 4 out of 10 students like a game, how many students like it in a survey of 800?

Back

320 students like the game.

Front

What percentage of students in a survey do not wash their hands if 48% do not?

Back

48% of the surveyed students do not wash their hands.

Front

What is the formula to calculate the number of students who like a game based on a fraction?

Back

Number of students = (Fraction of students who like the game) x (Total number of students surveyed).