CASIO fx-82AU User Manual

Casio fx-82AU

Statistical calculations

Learning Skills

Introduction:

This sheet will teach you how to use the Casio fx82AU calculator to perform statistical operations. See also our handout for mathematical functions. Any further queries please contact Student Central.

This sheet will teach you to:

Change settings on your calculator

Put your calculator into statistical mode

Enter observations

Display the descriptive statistics

Enter group data

Perform linear regression

1. Settings on your calculator

To turn your calculator on:					ON
Your screen should show a small D and Math at the top of the screen
You need to change a couple of default settings before you start.
									The math will disappear from
Once you change these they will stay changed and will enable
									the screen. While in Math
you to better use your calculator.
									mode your answer will be
1.	Get out of Math mode into linear mode								given as fractions, even if you
									put in the information using
Calculator steps:		shift		setup			2		the ÷ key. This is mentioned
									in our math handout

2. Change the default so that small decimal answers read in decimal format rather than exponent format. To check if this needs to happen

Enter	1	÷	200		=
If your answer shows as					5 10		3
									Until this is reversed your
									answers will be read as
Calculator steps:		shift		setup			8	2
									decimals.

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2. Calculation Mode

This is the mode where you perform all your standard or non-statistical functions

Calculator steps: MODE1

3. Statistics Mode

This will enable you to enter data for descriptive statistical analysis. To put your calculate into statistical mode

Calculator steps:

MODE

2 1

Frequency mode

If you are entering data that is in a frequency table you then

This will enable you to enter a

need to do the following

score and its frequency. Each

score will have a frequency of 1

Calculator steps:

SHIFT

SETUP

down arrow 3

1

To turn the frequency off

unless you use the right-arrow to

enter a frequency cell and

overwrite that frequency. See

Calculator steps:

SHIFT

SETUP

down arrow 3

2

the section entering

observations from a frequency

table on how to enter data.

To clear the statistical memory, exit stats mode back to comp

mode and re-enter stats mode, this should be done before entering any new data

Calculator steps:

MODE

1

MODE

2

1

To check stored data:

SHIFT

1

2

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4. Entering single variable observations

To enter observations press				Number of scores
= after entering the observation				The number of scores (n) is 4
Example 2.1				this is displayed while entering
Enter 10, 12, 13, 16
Calculator steps:	10 =	12 =	13 =	16 =	AC

AC after entering

You press AC after you have finished entering data to tell the calculator that you have completed.

It is also necessary in between displaying the descriptive statistics to clear the previous value

5. Display the Descriptive Statistics

Calculator

Common

Calculator steps

answer

symbol

symbol

mean

x

x or

12.75

AC

shift

1

5

2

=

Sample standard

s

2.5

x

n 1

AC

shift

1

5

4

=

deviation

Population

x

n

2.165

AC

shift

1

5

3

=

standard deviation

Sample variance

2

6.25

s

AC

shift

1

5

3

=

x

2

Scores added up

51

x

x

AC

1

4

2

=

Scores squared

669

x

2

x

2

AC

shift

1

4

1

=

then added up

Descriptive Statistics

The equal sign must be pressed at the end to bring up the value of the descriptive statistic you are after.

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