Making Inferences from Random Samples

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 can you determine if a sample is biased?

Back

If the sample is taken from a specific group that does not reflect the diversity of the entire population, it is likely biased.

Front

What does it mean to make an inference?

Back

To make an inference means to draw a conclusion based on evidence and reasoning rather than from explicit statements.

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest.

Front

Why is it important to use random samples in surveys?

Back

Random samples help ensure that the results are representative of the entire population, reducing bias.

Front

What can you infer if a person is wearing a raincoat?

Back

You can infer that it is likely raining or that rain is expected.

Front

What is the sample size in a study?

Back

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

Front

What is the difference between qualitative and quantitative data?

Back

Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.

Front

What is an example of making an inference from a data set?

Back

If a survey shows that 70% of students prefer chocolate ice cream, you can infer that chocolate is a popular choice among students.