Measures of center and variation

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What is an outlier?

Back

An outlier is a value that is much higher or much lower than the other values in a set of data.

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What are the measures of central tendency?

Back

The measures of central tendency are Mean, Median, and Mode.

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CCSS.6.SP.A.3

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How do you calculate the mean of a data set?

Back

To calculate the mean, add all the values together and divide by the number of values.

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CCSS.6.SP.B.5C

Front

What is the formula for relative frequency?

Back

Relative frequency = (Frequency of the category) / (Total number of observations) * 100%.

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CCSS.8.SP.A.4

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What is the median?

Back

The median is the middle value in a data set when the values are arranged in ascending order.

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CCSS.6.SP.B.5C

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What is the mode?

Back

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

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CCSS.6.SP.B.5C

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How do you find the range of a data set?

Back

The range is found by subtracting the smallest value from the largest value in the data set.

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CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

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What is a box plot?

Back

A box plot is a graphical representation of data that shows the distribution through quartiles.

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CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Front

What does a histogram represent?

Back

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

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CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Front

What is the significance of the 25th and 75th percentiles in a box plot?

Back

The 25th percentile (Q1) represents the lower quartile, and the 75th percentile (Q3) represents the upper quartile, indicating the spread of the middle 50% of the data.

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CCSS.6.SP.B.4

CCSS.HSS.ID.A.1