Descriptive Statistics

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What is Descriptive Statistics?

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Descriptive Statistics is a branch of statistics that summarizes and describes the characteristics of a data set, including measures of central tendency (mean, median, mode) and measures of variability (range, variance, standard deviation).

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What is Quantitative Data?

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Quantitative data refers to numerical data that can be measured and expressed mathematically. Examples include height, weight, and age.

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What is Categorical Data?

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Categorical data refers to data that can be divided into groups or categories that do not have a numerical value. Examples include favorite color, type of food, and state of residence.

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What is the Median?

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The median is the middle value in a data set 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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What is Quartile 3 (Q3)?

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Quartile 3 (Q3) is the median of the upper half of a data set, representing the 75th percentile. It divides the highest 25% of data from the rest.

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How do you find the Mean?

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To find the mean, add all the numbers in a data set and divide by the total number of values.

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What is a Box and Whisker Plot?

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A Box and Whisker Plot is a graphical representation of a data set that shows its minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

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What is the Range of a Data Set?

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The range is the difference between the highest and lowest values in a data set.

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What is Variance?

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Variance is a measure of how much the values in a data set differ from the mean. It is calculated by averaging the squared differences from the mean.

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What is Standard Deviation?

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Standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation means that the values tend to be close to the mean.