Review: Frequencies

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What is frequency in statistics?

Back

Frequency refers to the number of times a particular value or category occurs in a dataset.

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How do you calculate the percentage of a subgroup in a population?

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Percentage = (Number of individuals in the subgroup / Total number of individuals) x 100.

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What is a survey?

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

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What does it mean if a survey result is statistically significant?

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It means that the results are unlikely to have occurred by chance and are likely to reflect true differences in the population.

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What is a sample in statistics?

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

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data involves numerical values that can be measured.

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What is a demographic?

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Demographics are statistical characteristics of a population, such as age, gender, income, and education level.

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How can you determine the mode of a dataset?

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

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What is a bar graph used for?

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A bar graph is used to represent categorical data with rectangular bars, where the length of each bar is proportional to the value it represents.

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What does it mean to stratify a sample?

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Stratifying a sample means dividing the population into subgroups (strata) and sampling from each subgroup to ensure representation.