Prob & Stats FINAL EXAM (V3)

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What is a convenience sample?

Back

A convenience sample is a type of non-probability sampling where the sample is taken from a group that is easy to reach. It may not represent the entire population accurately.

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What is a voluntary response sample?

Back

A voluntary response sample is a type of sampling where individuals choose to participate, often leading to biased results as those with strong opinions are more likely to respond.

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What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables, displaying data points on a two-dimensional axis.

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What does a correlation value (r) close to 1 indicate?

Back

A correlation value (r) close to 1 indicates a strong positive linear relationship between two variables.

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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.

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What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group in a statistical analysis.

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What is the mode of a data set?

Back

The mode is the value that appears most frequently in a data set.

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What is a quartile?

Back

A quartile is a type of quantile that divides a ranked data set into four equal parts.

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What is the difference between descriptive and inferential statistics?

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Descriptive statistics summarize and describe the characteristics of a data set, while inferential statistics use a sample to make inferences about a population.

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What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, using bars to show the frequency of data within certain ranges.