population inferences

Front

What is a sample in statistics?

Back

A sample is a subset of individuals selected from a larger population, used to estimate characteristics of the whole population.

Front

What is a population in statistics?

Back

A population is the entire group of individuals or instances about whom we hope to learn.

Front

If a survey is conducted with 150 people, what does this number represent?

Back

This number represents the sample size, which is the number of individuals surveyed.

Front

How do you calculate the probability of an event?

Back

Probability is calculated as the number of favorable outcomes divided by the total number of possible outcomes.

Front

What is the probability of picking a red or blue marble from a jar containing 2 pink, 6 red, and 4 blue marbles?

Back

The probability is 5/6.

Front

What is the difference between a sample and a population?

Back

A sample is a part of the population, while the population includes all members of a specified group.

Front

What does it mean to infer about a population?

Back

To infer about a population means to make conclusions or predictions about the entire group based on the analysis of a sample.

Front

What is a biased sample?

Back

A biased sample is one that does not accurately represent the population, leading to skewed results.

Front

What is a random sample?

Back

A random sample is a sample that is selected from the population in such a way that every individual has an equal chance of being chosen.

Front

What is the importance of sample size in statistics?

Back

Larger sample sizes generally lead to more accurate and reliable estimates of population parameters.