1.7 Summary Statistics for One Quantitative Variable - Quiz

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Last updated 11:16 PM on 9/29/26
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12 Terms

1
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Mean

Add all of the numbers together and divide by the amount of numbers you have.

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Median

Order the numbers from smallest to largest and find the number in the middle. IMPORTANT - if the amount of numbers is even you have to add the two numbers in the middle together and divide by 2.

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Minimum…

The smallest data value

Ex: 12, 18, 25

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Maximum…

The largest data value

Ex: 12, 18, 25

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Measure of Center - Mean

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<p>When finding the Sample Mean…</p>

When finding the Sample Mean…

Formula:

Use the Formula:

x = sample mean

xi = each data value

n = total of data values ex: 5,7,9,7,4 = 5 total

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<p>When finding the Population Mean…</p>

When finding the Population Mean…

Use the Formula:

M = mew

sigma = “addition sign”\

n = total population

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Quartiles and Percentiles

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Q1

The median of the lower half of the ordered data

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Q2

The median of the entire data set

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Q3

The median of the upper half of the data set

12
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How to find the Percentile?

Look for the value that has the p% of data less than or equal to it, *when data is sorted from smallest to largest*