Statistics Review

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What is a statistical question?

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A statistical question is one that anticipates variability in the data and can be answered by collecting data. For example, 'How many sixth graders eat breakfast each school day?' is a statistical question.

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What is the median in a data set?

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

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Why do companies conduct surveys about customer preferences?

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Companies conduct surveys to gather data on customer preferences, which helps them make informed decisions about product features, such as color, to meet market demand.

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How do you identify an outlier in a data set?

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An outlier is a value that is significantly higher or lower than the other values in a data set. It can be identified by comparing it to the rest of the data.

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What does it mean to analyze data?

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Analyzing data involves examining and interpreting the data to draw conclusions or make decisions based on the information collected.

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What is a mode in statistics?

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The mode is the value that appears most frequently in a data set. A data set may have one mode, more than one mode, or no mode at all.

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What is a range in a data set?

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

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What is a sample in statistics?

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

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What is the purpose of a histogram?

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A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within certain ranges.

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What is a bar graph used for?

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A bar graph is used to compare different categories of data by showing the frequency or value of each category with rectangular bars.