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Stats L4, Application of averages

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by

dan lin

on 13 March 2013

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Transcript of Stats L4, Application of averages

Application of Averages
When to use the mean, median, or mode. The mean is usually the best average when no numbers in the data set are significantly different from the other numbers. The median is usually the best average when there are number
in the data set that are significantly different. The mode is usually the best average when the data represent
measures, such as shoe size or clothing sizes.
A store needs to restock the sizes that sell most often. Number of chips in a bag: 40, 42, 41, 43, 40, 42 Test scores: 10, 77, 78, 80, 88, 95 99 Shoe sizes sold this week: 9,13, 4, 9, 9, 6, 9, 7, 9, 12, 9 Record on the board your weekly allowance.

Using the class data, find the mean, median,
and mode.
Find the range.

Which measure best describes the average
weekly allowance? Explain. The daily high temperatures for one week during summer in Vancouver were:

27,31,23,25,28,23,&28 degrees C.

Find the mean, median, and mode.

Which average best describes the daily high temperature for the week? Explain

The weather channel reported the average temperature as 23 C. Is this correct? Explain HW
Handout Sheets
2-6, and 2-5 :)
Full transcript