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The value in a set of data that occurs most often.

The sum of all the data values divided by the

number of data values.

The middle value of the data set when it has been

arranged in ascending order. That is, from the

smallest value to the highest value.

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A class of 25 students takes a math test, here are

the scores… 

75, 87, 93, 60, 85, 83, 94, 64, 77, 75, 93, 53, 83,

82, 74, 68, 57, 91, 83, 89, 75, 85, 77, 68, 100

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To find the mean… 

Add up all the test scores.

75 + 87 + 93 + 60 + 85 + 83 + 94 + 64 + 77 +

75 + 93 + 53 + 83 + 82 + 74 + 68 + 57 + 91 +83 + 89 + 75 + 85 + 77 + 68 + 100 = 1917

Divide the number of test scores by 25.

1917/25 = 78.84

78.84 is the class average for the exam.

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To f ind the median… 

Organize the numbers from highest to lowest.

53, 57, 60, 64, 68, 68, 74, 75, 75, 75, 77, 77, 82,

83, 83, 83, 85, 85, 87, 89, 91, 93, 93, 94, 100

Cross numbers out from each end until you reach

the middle.

53, 57, 60, 64, 68, 68, 74, 75, 75, 75, 77, 77, 82,

83, 83, 83, 85, 85, 87, 89, 91, 93, 93, 94, 100

This means that your median is 82.

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  To find the mode… 

Organize the numbers from highest to lowest.

53, 57, 60, 64, 68, 68, 74, 75, 75, 75, 77, 77, 82,

83, 83, 83, 85, 85, 87, 89, 91, 93, 93, 94, 100

Look for the number that occurs most often.

Since 75 and 83 both occur three times, they are

both the mode.

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Cheat Yeats wants to calculate his GPA for the

year. His final grades are… 

Reading – B+

Writing – A-

Arithmetic – A

Government – B

Snorkeling – A -

Carpentry – B-

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He compares his grades to the GPA grade values

GPA Grade Values

B+ = 3.3

A- = 3.7

A = 4.0

B = 3.0

A- = 3.7B- = 2.7

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Add them all together.

3.3 + 3.7 + 4.0 + 3.0 + 3.7 + 2.7 = 20.4

Divide 20.4 by 6.

20.4/6 = 3.4

Yeats learned that his GPA was a 3.4.

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In certain cities like Miami one would think that it is rich and

prosperous because of the millionaires, artists, and movie stars

that live there. However, the working class makes Miami one of the poorest cities to live income wise. With regular salaries

ranging from $78,000 to $5000 per household, the median

salary is set around $25,000. Most Americans do not know that

Miami is considered to be one of the poorest cities in the USAwhen looking at the (median) salary this is obvious. This is one

thing that the median can be used for.

The mode is 16-24 years old. The mode can be used is data like

this to show what age group does the most exercise.

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 Kerry Riley

Caitlynne McGaff 

Jack Flaherty

Kaitlyn ConleyArluah Wonton

Section 21

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