Question about Texas Instruments TI-30 XIIS Calculator

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Texas 30XIIB binomial cdf

How do you calculate binomial CUMULATIVE distribution on the Texas 30XIIB calculator without simply adding all the individual binomial pdfs? is there a mode or an equation that can be used? thanks in advance!

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The only known equation for the cumulative binomial distribution is the sum of the individual binomial probabilities. Some more sophisticated (and more expensive) calculators have that equation built in, but the 30xii does not.

If n>30 and n*p>5 and n*(1-p)>5 then you can approximate the cumulative binomial with the normal probability function, but again the 30xii does not have that built in.

Posted on Apr 14, 2014

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6.02 X 10y*23

y* is y raise to X

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SOURCE: faint numbers show on screen of T-85 texas calculator

Hello,
Make sure you have fresh batteries. Increase contrast

First possibility.
Press [2nd] and hold pressure
Press UpArrow and repeat this step

2nd Possibility
Press [2nd] key then release
Press UpArrow then release
Repeat the two steps in sequence till contrast is to you liking.

Hope it helps.

Posted on Sep 11, 2009

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SOURCE: Inputing scientific notation into my calculator

Hello,

1. To convert a number to scientific equation, use [2nd][Sci]
Exemples 12345 [=] screen shows 12345 Then [2nd][Sci] coverts it to 1.2345 ^04 to the power 4.
2. To enter directly a number in scientific notation (e.g. -1.2345 X10^(-65) a very small number) you use the [EE] key 1.2345[+ /-][EE][+/-]65 shows as -1.2345 -65
1.6X10^(-19) 1.6[EE][+/-]19 shows as 1.6 -19

Hope it helps

Posted on Sep 17, 2009

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SOURCE: how to clear the memory key on Texas instrument

Hello,
Your calculator has 3 memories (M1, M2,M3)
To store the number 170 in M1 use 170[STO]1
To recall a number from M1 use [RCL]1
To add a number to the content of M1 [2nd][SUM]1 (adds displayed value to contents of M1).
[2nd][EXC] 2 exchanges the value already displayed with the contents of M2:

To erase (clear) a memory register, just store 0 in it.

Hope it helps.

Posted on Oct 22, 2009

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