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Take the iPhone, iPad, Blackberry Torch, etc. Would they be nearly as popular or effective if they had an additional "backup" navigation method? If the iPad had a proper keyboard? If the iPhone had a directional pad on it? No, because this would defeat the purpose of the touchscreen.
If there is a hardware method of navigation that functions perfectly well and is very easy to use, which it would have to be since the main method of using the device would be the touchscreen, then
a) why use the touchscreen in the first place? People would have to learn two completely different methods of using the calculator, and people complain about the Nspire being "complicated" enough already.
b) Having a different method of navigation and use in PTT mode would be like having a different calculator on the test. As a teacher, I always tell students that it is better to have their own calculator than to keep borrowing one in class because they need to know how to use the device inside out, otherwise it will just slow them down on a test.
I think that companies know this, which is why they design their touch-enabled devices like they do, so I doubt they would make the kind of calculator you describe.
--Eric
> https://sites.google.com/site/tinspiregroup/classroom-news/welcome-abouttime
--Eric
Sent from my iPhone
Lana
> https://sites.google.com/site/tinspiregroup/classroom-news/welcome-abouttime
So Command-N for a new document,
then work on the document, and
Command-W to close the window, but then
the sensible message "Do you want to save before this document is closed" Yes, No, Cancel
requires the Option-y for yes, option-n for no.
This seems to be a vestige from Windows and while it seems so minor, I do it 50 times a day and always have to think about it and then find the option-key. The traditional Mac response is command-Y or command-N.
Al
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It is known that the sum of the squares of m standard normal random variables is chi-square with m degrees of freedom.
http://en.wikipedia.org/wiki/Chi-squared_distribution
Therefore, one method to generate a random sample from a chi-square distribution with m degrees of freedom would be to generate m samples from a standard normal and then sum the squares of the m samples. For example, to generate a random sample from a chi-square with 25 degrees of freedom, the following command could be used on the Nspire:
Sum(randnorm(0,1,25)^2).
Wayne
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