Question about Casio FX-115W Plus Calculator

# Having trouble with standard deviaation and X bar using Casio

How do i figure out the Xbar and S^2 using casio calculator fx115 w

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Hello,
Here is an example from the manual.

Hope it helps.

Posted on Oct 04, 2009

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Posted on Jan 02, 2017

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## Related Questions:

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Press [SHIFT][Log_ab], below the ON button. Better use the MathIO input/Output mode.

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### Calculate the inverse of a 4X4 matrix on fx-570ms

The Casio FX-570MS does not handle matrices. So you cannot create matrices, let alone invert them. Sorry.
The Casio FX115 ES handles matrices for up to 3X3 dimension. Create the matrix.Have its name displayed on the command line and press the [x^-1] (reciprocal ) key.

Apr 16, 2014 | Casio FX-115ES Scientific Calculator

### I have 50 data points for which i need to find standard deviation on a classpad 330 , is there any quicker way to calculate than minusing the mean from every data point?

Here is one technique I used on the TI84Plus.
Create two lists list1(50) and list2(50) of equal dimension (same length)
You will have to find how to do it on ClassPad.
Fill list2 with zeros
Sort the list in ascending order (if it is not sorted)
Do standard deviation calculation on list1 (or calculate the average)
The mean of the data is in a special variable (xbar)
From the command line using the list syntax calculate abs(list1-xbar) and store results in list2, overwiting the zeros.
Perform standard deviation on the new list2. You will get the mean deviation from the mean in the variable xbar.

A simple request from you. Can you please not use MINUS as a verb? By doing so you are propagating incorrect usage. There is a short and correct way to express the operation: to add.

May 05, 2012 | Casio ClassPad 300 Calculator

### I need straightforward key strokes for a casio fx115 es graphing calculator to solve linear equations. I have the Manuel but it only confuses me. this is an example of what I'm solving ...

This calculator doesn't really support a solver like that. You can use Woflram Alpha to solve equations like that really quickly. Example
There are more expensive calculators that will solve these types of equations, but I would recommend just using Wolfram Alpha whenever you need a solution to a math problem.

Mar 02, 2011 | Casio FX-115ES Scientific Calculator

### How to use that standard deviation on the Casio fx-260solar calculator

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

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

Apr 27, 2010 | Casio FX-260 Calculator

### What does the xbar look like on the calculator

Hello,
Usually it is represented by a small letter x with a short straight bar on top of it. Sometimes it is an x with a small caret (hat, accent circonflexe) on top of it. I do not have the layout of your calculator, but if you see on the body of the calculator a small n (the number of entries), a greek capital sigma σ or a small sigma σ with x (xσn or xσn-1) standard deviations, the xbar is not far away.
Hope it helps.

Nov 17, 2009 | Casio FX-115W Plus Calculator

### Standard Deviation

Hello,

In the main menu select [STAT] icon to enter Stat mode and display the statistical data lists. Use the satistical data lists to input data and perform statistical calculations. Use the arrows to move the highlighting around the lists.
Exemple: Enter the following values in List 1
1st line enter 90 [EXE]
2nd line 85 [EXE]
3 79 [EXE]
4 75 [EXE]
5 70 [EXE]
6 68 [EXE]
7 56 [EXE]

When finished you press [F2:Calc], then [F1:1Var] and the statistical results appear on screen.
Title of screen : 1-Variable
x bar =74.7142857
Capital Sigma x= 523
Capita Sigma X squared = 39851
x lower case sigma n = 10.5249945
x lower case sigma n-1= 11.3682934
n = 7
Scroll down with Down arrow to access other data
minX =56
Q1=68
Med =75
Q3=85
Xbar -x lower case sigma n =64.1892911
x bar + x lower case sigma n = 85.2392802
maxX=90
Mod=90

All you have to do now, is to look at the theory you learned and interpret what these values mean.

Hope it helps.

Mar 09, 2009 | Casio CFX-9850G Plus Calculator

### Standard deviation

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 =

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

### User manual

This page contains 2 manuals for FX115 calculators, and while the standard seems to be MS, each manual includes several models. This should address what you need.
http://www.retrevo.com/s/Casio-fx-115MS-Calculators-review-manual/id/467ci265/t/1-2/
If you need more help, please post back, otherwise thank you for using and rating FixYa!

Jun 04, 2008 | Casio Office Equipment & Supplies

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