Algebra 1 Notes - Poudre School District · 2018. 4. 3. ·...

A1V111MeasuresOfCenterAndVariation.notebook April 03, 2018

Algebra 1 Notes

P74 111 Measures of Center and Variation


Measures of Central Tendency

Mean Average

Median Order Numbers(Number in the Middle or Mean of two Middle Numbers)

Mode Most Frequent3 is the mode

2,3,3,4,5,6,8,9

= 40/8 = 5

= 4 + 5 = 9 9/2 = 4.5


If No Outlier is in Data Use Mean...

If Outlier is in Data Use Median...


If you want Most Popular use Mode...

If you want "Variation" of the Data...


An amusement park hires students for the summer.

The students’ hourly wages are shown in the table.

a. Find the mean, median, and mode of the hourly wages.

b. Which measure of center best represents the data? Explain.

The table shows the annual salaries of the employees of an auto repair service.

(a) Identify the outlier.

How does the outlier affect the

mean, median, and mode?

(b) Describe one possible explanation for the outlier.


3,4,5,6,7,7,8,9,9,10,11,12,14,16,18

Measures of Variation

Two reality cooking shows select 12 contestants each. The ages of the contestants are shown in the tables. Find the range of the ages for each show. Compare your results.


Assignment???

Please put your name and class period at the top of the homework.Also include the homework number.


Find the mean, median, mode, range, and standard deviation of the

altitudes of the airplanes when each altitude increases by 1 miles.


Standard Deviations

3,4,5,6,7,7,8,9,9,10,11,12,14,16,18Measures of Variation

Standard Deviation


Measures how much values in a data set vary, or Deviate, from the mean...

Standard Deviation

Lowercase Sigma

Algebra 1 Notes - Poudre School District · 2018. 4. 3. ·...

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