Question about Texas Instruments BA-II Plus Calculator

**Probability****Return(A)****Return(B)**Good0.20.300.50Ok0.50.100.10Poor0.3-0.25 -0.30 **Portfolios with more than one asset: **Given the returns and
probabilities for the three possible states listed here, calculate the
covariance between the returns of Stock A and Stock B. For
convenience, assume that the expected returns of Stock A and Stock B are
11.75 percent and 18 percent, respectively.

Posted on Jan 29, 2013

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Posted on Jan 02, 2017

So expected returns are just a little more advanced version of probability - without getting too in detail it uses weighted averages so you do not have to add the same number 17 times.

Let's first define our variables:

E(X) = Expected Return X1 = Variable 1 P1 = Probability 1 (in decimal format so 55% would be .55) X2 = Variable 2 P2 = Probability 2 (P2 is also equal to 1 - P1)

So the expected return formula is as follows:

E(X) = (X1)*(P1) + (X2)*(P2)

Plugging in our given numbers we get E(X) = Expected Return X1 = 300,000 P1 = 10% or .1 X2 = 40,000 P2 = 1 - P1 = 1 - .1 = .9

E(X) = (300,000)*(.1) + (40,000)*(.9) E(X) = 66,000

Now remember this does not include the opportunity cost of spending your four years in college studying biology instead of another degree.

Let's first define our variables:

E(X) = Expected Return X1 = Variable 1 P1 = Probability 1 (in decimal format so 55% would be .55) X2 = Variable 2 P2 = Probability 2 (P2 is also equal to 1 - P1)

So the expected return formula is as follows:

E(X) = (X1)*(P1) + (X2)*(P2)

Plugging in our given numbers we get E(X) = Expected Return X1 = 300,000 P1 = 10% or .1 X2 = 40,000 P2 = 1 - P1 = 1 - .1 = .9

E(X) = (300,000)*(.1) + (40,000)*(.9) E(X) = 66,000

Now remember this does not include the opportunity cost of spending your four years in college studying biology instead of another degree.

Feb 27, 2011 | Texas Instruments BA-II Plus Calculator

( . 2 9 * . 3 9 ) + ( . 5 5 * . 2 2 ) + ( . 1 6 * . 2 +/- ) =

In AOS mode you can skip the parentheses.

In AOS mode you can skip the parentheses.

Oct 03, 2010 | Texas Instruments BA-II Plus Calculator

- Press [Y=] (Esc) meaning Escape to return to menu.
- But before, the calculator will ask you whether you want to clear all trials from memory.
- Answer [Y=] (Yes). You will be returned to the Probability Simulation List of simulations.
- Press [GRAPH](Quit).
- You will be prompted again if you want to quit.
- Answer [Y=] (Yes).

Dec 16, 2009 | Texas Instruments TI-83 Plus Calculator

Hi,

You will have to report faithfully the message returned, you cannot use your interpretation of the message. Error messages are codified. Each one will correspond to very particular error conditions. I did check the manual for all possible error messages and there is none that states wrong info.

My hunch is that there are errors in your data, but I can't say what type of error: I do not have the actual message returned. Verify you data, item by item, and try again.

**To make sure that the calculator is well configured to do statistics**

Hope it helps.

Thank you for rating this solution

You will have to report faithfully the message returned, you cannot use your interpretation of the message. Error messages are codified. Each one will correspond to very particular error conditions. I did check the manual for all possible error messages and there is none that states wrong info.

My hunch is that there are errors in your data, but I can't say what type of error: I do not have the actual message returned. Verify you data, item by item, and try again.

- Press [STAT][5:SetUpEditor][ENTER]
- Press [2nd][0] (CATALOG) and press [PRGM] (C) to jump to the first command starting with C.
- Scroll down to [ClrAllListsts] and press [ENTER]
- Calculator replies
**Done**

Hope it helps.

Thank you for rating this solution

Dec 11, 2009 | Texas Instruments TI-83 Plus Calculator

Here is what you do:

1) Press the Mode button.

2) Scroll down the list that appears until you find "Exact/Approx".

3) Change the setting for "Exact/Approx" to Exact.

4) Press enter to save the settings change.

You have three possible settings for "Exact/Approx":

1) Auto - The calculator will try to determine the best format.

2) Exact - The calculator will always give the answer in fraction form.

3) Approximate - The calculator will always give the answer in decimal form.

1) Press the Mode button.

2) Scroll down the list that appears until you find "Exact/Approx".

3) Change the setting for "Exact/Approx" to Exact.

4) Press enter to save the settings change.

You have three possible settings for "Exact/Approx":

1) Auto - The calculator will try to determine the best format.

2) Exact - The calculator will always give the answer in fraction form.

3) Approximate - The calculator will always give the answer in decimal form.

Nov 15, 2009 | Texas Instruments TI-89 Calculator

Your poor calculator just can't seem to fit the values you want onto your graph without risking unsightly stretch marks. To fix this, either press the "ZOOM" key and return to "ZStandard", or press "WINDOW" and define more acceptable (or possible) dimentions.

Nov 11, 2009 | Texas Instruments TI-83 Plus Calculator

You can use the stdDev( function found on the LIST MATH menu. Press 2ND LIST Left-arrow to get to that menu.

Jul 16, 2009 | Texas Instruments TI-84 Plus Silver...

http://www.vtechphones.com/vtechui/support/manual.cfm?manualID=21705

Jul 13, 2009 | Vtech Digital Cordless Telephone VT-2568

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

Apr 14, 2009 | Texas Instruments BA-II Plus Calculator

Hi there, there are a couple possibilities. First, Remove the cover where the paper feeds out, if there is a ribbon or an ink roller in there it will need replacing. This you can get a staples. The other possibility is, if there is no ribbon or ink roll, it is probably a thermal printer which means is uses a special heat sensitive paper. If this started when you changed the paper, this is most likely the problem. This you can also get at staples!

Jun 19, 2007 | Canon BP120 DH Calculator

Sep 11, 2014 | Texas Instruments BA-II Plus Calculator

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