# TI BA II Calculator Question

Is there a way to calculate a question like this using the TI BA II Plus using just inputs? I know you can calculate std, var, mean, etc. using the [2nd] Data function but once probabilities are involved is this still possible? Given P(X=2) = 0.3, P(X=3) = 0.4, P(X=4) = 0.3. What is the variance of X? I know you manually calc it as E® = 0.3(2) + 0.4(4) + 0.3(4) = 3. --> Variance = 0.3(2-3)^2 + 0.4(3-3)^2 + 0.3(4-3)^2 = 0.6 Also, anybody know any other helpful TI BA II calculator hints? I have the depreciation down, is there a way to convert from Annual rate to BEY, and visa versa? Thanks in advance. m

Mods: please delete this thread. I saw this: http://www.analystforum.com/phorums/read.php?11,1134400 sorry. thanks. m

how do you calculate depreciation on your calculator?

By using the depreciation function found above key 4. ie: [2ND] [4] it’ll put you in depreciation mode, where you can input the years, initial cost, salvage value, and depreciation method. Check your TI manual for detail (pg 61)

Quartic does an online calculator guide, including all these functions.

whmose Wrote: ------------------------------------------------------- > Quartic does an online calculator guide, including > all these functions. Link? I couldn’t find what you are talking about… thanks in advance.

look on http://www.quartic-training.co.uk/links for video downloads (on the right). or see story on homepage http://www.quartic-training.co.uk/index.

i know wat u sayin man. Its such a breeze calculating StdEV, correlation ect using the 2nd Data function on the TI. Problem comes in wen probabilities are included. Would really help if someone knows how to do it. Pls post if u figure it out.

aslamdt Wrote: ------------------------------------------------------- > i know wat u sayin man. Its such a breeze > calculating StdEV, correlation ect using the 2nd > Data function on the TI. Problem comes in wen > probabilities are included. Would really help if > someone knows how to do it. Pls post if u figure > it out. http://www.analystforum.com/phorums/read.php?11,1134400