7th Grade Statistics

Front

What is the definition of a population in statistics?

Back

A population in statistics refers to the entire group of individuals or items that we want to learn about.

Front

What is a sample in statistics?

Back

A sample is a subset of the population that is used to represent the entire group.

Front

What does it mean for a survey to be random?

Back

A random survey means that every individual in the population has an equal chance of being selected.

Front

What is bias in a survey?

Back

Bias occurs when the sample is not representative of the population, leading to skewed results.

Front

How do you calculate the predicted number of satisfied adults from a percentage?

Back

Multiply the total number of adults surveyed by the percentage (in decimal form) of those satisfied.

Front

If 85% of 500 adults are satisfied with their job, how many are satisfied?

Back

425 adults are satisfied (0.85 * 500 = 425).

Front

What is the difference between a biased sample and a random sample?

Back

A biased sample does not accurately represent the population, while a random sample does.

Front

What is a survey?

Back

A survey is a method of collecting data by asking people questions.

Front

What is the importance of sample size in surveys?

Back

Larger sample sizes generally lead to more accurate and reliable results.

Front

What is a statistic?

Back

A statistic is a numerical value that describes a characteristic of a sample.