Measuring Data Variability and Centrality

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If we use the mean to measure the typical value or center of the data, we would use the _________ to measure the variability.

• IQR

• Median

• Mean

• Standard Deviation

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Corinne is planning a beach vacation in July and is analyzing the daily high temperatures for her potential destination. She would like to choose a destination with a high median temperature and a small interquartile range. She constructed box plots shown in the diagram above. Which destination has a median temperature above 80 degrees and the smallest interquartile range?

• Ocean Beach

• Whispering Palms

• Serene Shores

• Pelican Beach

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CCSS.6.SP.A.1

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CCSS.6.SP.B.5

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What is the Intergquartile range of the box-plot with the lesser IQR?

The interquartile range (IQR) measures how far the data is spread from the mean.

• true

• false

If data is skewed right the ________ is more appropriate.

• mean

• median

• maximum

If data is symmetric the ________ is more appropriate.

• mean

• median

• minimum

The interquartile range and standard deviation are both measures of center.

• true

• false, only the interquartile range is.

• false, they both measure the spread of data

Which statistic is more resistant to outliers?

• mean

• median