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I have a very old scientific calculator (about 15 yrs old), EC 4031 brand is Tandy AKA Radioshack. desperately need to know how to use standard deviation and mean, for statistics. PLEASE HELP ME

Mean absolute deviation.

Let's break it down into its components.

Mean - Average

Absolute - absolute value - sign doesn't matter - if negative, make positive

Deviation - difference from the mean

Let's do an example. Population 3 7 4 2. Total 16. Mean (Average) 16/4 = 4.

Deviations

3 - 4 = -1 absolute value 1

7 - 4 = 3

4 - 4 = 0

2 - 4 = -2 absolute value 2

Sum of these deviations 1 + 3 + 0 + 2 = 6

Mean (average) of these deviations is 6 / 4 = 1.5.

Good luck,

Paul

Let's break it down into its components.

Mean - Average

Absolute - absolute value - sign doesn't matter - if negative, make positive

Deviation - difference from the mean

Let's do an example. Population 3 7 4 2. Total 16. Mean (Average) 16/4 = 4.

Deviations

3 - 4 = -1 absolute value 1

7 - 4 = 3

4 - 4 = 0

2 - 4 = -2 absolute value 2

Sum of these deviations 1 + 3 + 0 + 2 = 6

Mean (average) of these deviations is 6 / 4 = 1.5.

Good luck,

Paul

Apr 05, 2016 | Texas Instruments TI-30Xa Scientific...

To convert an x value to a z-score, the formula is:

(x value - mean)/standard deviation

Example: We have a number of height measurements that have a mean of 65.25 and a standard deviation of 2.84. One value is 68.5. To convert it to a z-score: (68.5-65.25)/2.84 = 1.144

Hope this helps!

(x value - mean)/standard deviation

Example: We have a number of height measurements that have a mean of 65.25 and a standard deviation of 2.84. One value is 68.5. To convert it to a z-score: (68.5-65.25)/2.84 = 1.144

Hope this helps!

Oct 19, 2013 | Texas Instruments TI-36X Pro Scientific...

Follow the instructions beginning on page 26 of the FX-570MS manual: http://support.casio.com/pdf/004/fx115MS_991MS_E.pdf

Jun 15, 2013 | Casio Fx-570ms 2-line Display Scientific...

Follow the instructions beginning on page E-44 of the fx-115ES manual: http://support.casio.com/pdf/004/fx-115ES_991ES_E.pdf

Jun 15, 2013 | Casio FX-115ES Scientific Calculator

Full instructions are in the "Statistical Calculation" section beginning on page E-44 of the manual. If you need a manual, you may download a copy here.

In short, you go into the STAT mode, bring up the STAT Editor screen, enter the 50 data points, then calculate the mean and standard deviation.

In short, you go into the STAT mode, bring up the STAT Editor screen, enter the 50 data points, then calculate the mean and standard deviation.

Oct 13, 2011 | Casio FX-115ES Scientific Calculator

Radio Shack's manuals page for calculators is here. Your model isn't listed, but there are some close to it. You can try downloading some and see if any are similar enough to help. Hope you can find it!

Thanks for using Fixya!

Thanks for using Fixya!

Oct 24, 2010 | Computers & Internet

Click
on the Mode button twice until you see
“SD”. Select 1. This puts the calculator in Statistics Mode.
Enter the first number, 1.

Hit the M+. (n= 1 will appear in the window)

Enter the second number, 1.

Hit the M+ key. (n=2 will appear in the window)

. . . . .

Enter the last number, 7.

Hit the M+ key. (n=7 will appear in the window)

Hit shift, 2. (This invokes the S-Var option.)

Hit 1 for the sample mean. Hit Enter.

Hit 3 for the sample standard deviation that we will use in class. Hit Enter.

** **

Hit the M+. (n= 1 will appear in the window)

Enter the second number, 1.

Hit the M+ key. (n=2 will appear in the window)

. . . . .

Enter the last number, 7.

Hit the M+ key. (n=7 will appear in the window)

Hit shift, 2. (This invokes the S-Var option.)

Hit 1 for the sample mean. Hit Enter.

Hit 3 for the sample standard deviation that we will use in class. Hit Enter.

May 19, 2010 | Casio FX-115ES Scientific Calculator

Press 2ND [CSR] to clear the stat data.

For each data point, enter the number followed by SIGMA+

If you have grouped data, enter the number followed by 2ND [FRQ] followed by the frequency then SIGMA+

Press 2ND [sigma x n] for the population standard deviation or 2ND [sigma x n-1] for the sample standard deviation.

For each data point, enter the number followed by SIGMA+

If you have grouped data, enter the number followed by 2ND [FRQ] followed by the frequency then SIGMA+

Press 2ND [sigma x n] for the population standard deviation or 2ND [sigma x n-1] for the sample standard deviation.

May 25, 2009 | Texas Instruments TI-30X-IISTK Scientific...

- Calculator must be in SD mode (standard deviation mode) :Press [MODE] [.]
- However, if [FIX] or [SCI] appears on display you must press [MODE][9] first.
- Data input always starts with [SHIFT][SAC], to clear the registers of old data.
- Type a number and press the [DATA] key, it is the [M+] key at the bottom right of keypad.

Press [SHIFT] [9] (sigma n-1) to get sample standard deviation

Press [SHIFT][8] (sigma n] for the population standard deviation

Press [SHIFT] [7] (xbar) for the mean

Press [SHIFT] [6] (n) for the number of data entries

Press [SHIFT] [5] (capital sigma x) for the sum of values

Press [SHIFT] [4] (capital sigma x to y) for the sum of squares of the values

For additional information you might consider taking a look at the calculator manual

Jan 15, 2009 | Casio FX-260 Calculator

standard deviation

calculate mean of a data set:

1. Turn calc. on or press MODE SeTUP

2.Press 3 for STAT

3. Press 1 for VAR

4.Enter values for X column

5. WHen done entering press SHIFT 1

6.Press 5

7.Press 2 to calculate the mean

8.Press =

calculate mean of a data set:

1. Turn calc. on or press MODE SeTUP

2.Press 3 for STAT

3. Press 1 for VAR

4.Enter values for X column

5. WHen done entering press SHIFT 1

6.Press 5

7.Press 2 to calculate the mean

8.Press =

Oct 05, 2008 | Casio FX-115ES Scientific Calculator

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