worksheetmmm

Mean,
median, mode and range review sheet 1

Name: ____________
Class: ___

Date:
Jan. 20, 2009

You need to know how to calculate mean, median
and mode (and when it is best to use that measurement of central
tendency to describe a set of data).

Ex.
1

Find
the mean, median, mode, and range for the following list of values:
(Show all of your work)

 8,
9, 10, 10, 10, 11, 11, 11, 12, 13

Mode:

Median:

Mean:

Range:

Using an Excel
spreadsheet:

(I will demonstrate /
explain.)

Mean	=AVERAGE(B3:B14)
Median	=MEDIAN(B3:B14)
Mode	=MODE(B3:B14)

You
also need to know how to find one piece of data, if you have been
given a mean, median and mode.

Eg.
1: A student received the following grades on his tests: 87, 95, 76,
and 88.
He wants an 85 or better overall.

What
is the minimum grade he must get on the last test in order to achieve
that average?

Hint:
Use algebra.
The unknown score is "x".
Then
the desired average is:

(87
+ 95 + 76 + 88 + x)
_____________________ = 85

?

(87
+ 95 + 76 + 88 + x)
_____________________ = 85

=>
=

X =

What is y if the median
of the following set of data is 14?

13,
13, 13, 13, y, 14, 16, 18, 21

What is y if the median
of the following set of data is 13?

13,
13, 13, 13, y, 14, 16, 18, 21

What number can you add
(n) if the median of the following set of data is 16? Explain.

12,
13, 13, 14, 16, 18, 21, 23