Question about Texas Instruments BA-II Plus Calculator

# Standard Deviation & Mean ( With Probability)

Consider this example:

Asset G:

[Probability] [Return]
0.4 0.35
0.3 0.1
0.3 -0.2

Is there a way me to enter the data above and get it to tell me the:
1) Expected return (Answer = 0.11)
2) Standard Deviation (Answer = 0.2278)

I have used the [Data] mode but this seems only suitable for one set of data.

Posted by on

• Anonymous Apr 20, 2009

solving mean/variance/SD with probability table in Texas Instruments BA II plus calculator

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An expert who has achieved level 1.

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Http://www.thinkanddone.com/ge/Stat1.html

Posted on Apr 14, 2009

• mo_da164 Mar 11, 2011

The solution is not working.. not the website nor the Youtube Vid,

- We can get the expected return from the (EXy) => Summation of XY where x is the return and y is the probability (Risk)
-But we can't get the Standard deviation of returns (Segma) => NOT segma X NOR segma Y

• mo_da164 Mar 11, 2011

Please we need the solution swiftly.. it's important for the exam :)
saving us alot of time and effort

• dexteronline Mar 12, 2011

Hi Mo

The old links to calculator and YT video is no longer valid

If you wish to compute expected return and standard deviation from a set of data with possible returns and probabilities of occurence, then please follow this linkhttp://finance.thinkanddone.com/online-e... to an online calculator that calculates expected return and standard deviation

• dexteronline Mar 12, 2011

The link to the Calculator and the YT video is no longer valid, see the new links to Expected Return and Standard Deviation Calculator here athttp://finance.thinkanddone.com/online-e...

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Hi,
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Goodluck!

Posted on Jan 02, 2017

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my-video-file.mp4

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## Related Questions:

### How can I find the mean absolute deviation?

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

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

### How do you find themean absolute deviation?

The mean is the arithmetic average, so add up all the numbers and divide by the number of numbers.

The standard deviation is a little more involved. The formula and example are explained here:
Standard Deviation Formulas

Good luck.

Paul

May 07, 2015 | Office Equipment & Supplies

### What is deviation standard

The standard deviation is a measure of how "tight" the samples are distributed around your mean.
In layman's terms, a small standard deviation indicates that most of your measurements are in the vicinity of the means; a large standard deviation corresponds to readings that are all over the place.
You could also say that the smaller the SD, the more your mean is representative of the data set.
For a better explanation, just look up Standard deviation on Wikipedia!

May 03, 2014 | Audio Players & Recorders

### How do I calculate z score on TI-36X Pro?

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!

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

### About the formula in z-score

• The formula for calculating a z-score (or standard score) is:
z = (x - μ) / σ
• The variables in the z-score formula are:
z = z-score
x = raw score or observation to be standardized
μ = mean of the population
σ = standard deviation of the population
• Example of a z-score calculation:
You have an observation of 14.75, a population mean of 12.2, and a standard deviation of 1.75. Therefore, the z-score would be:
z = (14.75 - 12.2) / 1.75
z-score = 1.46

Sep 21, 2011 | Computers & Internet

### Which button do I use for the square root button? I have to perform math problems on... geometric mean population standard deviation sample standard deviation

The square root button is two up from the 9 key, just to the left of the divide key. To calculate the square root of 2, for example, press 2 square-root =

Jun 10, 2011 | Texas Instruments TI-30XA Calculator

### How do I use the standard deviation function?

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 30, 2010 | Casio FX-260 Calculator

### How to do standard deviation calculations?

M=500 and S=100 in a normal distribution, what percentage of the subjects have scores between 400 and 600

Jun 03, 2009 | Casio Office Equipment & Supplies

### How to compute standard deviation given a set of numbers?

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

Jan 15, 2009 | Casio FX-260 Calculator

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