Chapter 8 Statistics Study Guide

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. This helps ensure that the sample is representative of the population.

Front

What does it mean for a sample to be representative?

Back

A representative sample accurately reflects the characteristics of the population from which it is drawn, allowing for valid inferences to be made.

Front

What is bias in sampling?

Back

Bias in sampling occurs when certain members of the population are more likely to be selected than others, leading to an inaccurate representation of the population.

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

What is the median in statistics?

Back

The median is the middle value in a data set when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

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What is the range in statistics?

Back

The range is the difference between the highest and lowest values in a data set, indicating the spread of the data.

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What is a box plot?

Back

A box plot is a graphical representation of a data set that shows the median, quartiles, and potential outliers, providing a visual summary of the distribution.

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What does variability mean in statistics?

Back

Variability refers to how spread out or closely clustered the data points are in a data set. High variability indicates a wide range of values, while low variability indicates that the values are similar.

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What is a survey?

Back

A survey is a method of collecting data by asking people questions to gather information about their opinions, behaviors, or characteristics.

Front

What is a population in statistics?

Back

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