How do I use the stat editor to find regressions on my TI-89 Titanium?
So we learned this neat little trick for the TI-83 a couple of days ago in Pre-Calculus. We'd go to the stat editor and make two lists of data (L1 being the independent variable and L2 being the independent) and then we'd go to STAT=>CALC and choose LINREG (ax+b), QUADREG, etc. to find an equation. My first question is how do I do that on my TI-89 Titanuim? I go to the Stats app, make a list 1 and a list 2, I press f4 (calc), I go to regressions and press LinReg (ax+b). Then the confusing part, normally, on a TI-83, it'd just take you straight to the main screen and show you the equation, but this calculator takes you to a screen that requires you to type up a bunch of data I'll try and recreate this as best I can: X List: [ ... ] Y List: [ ... ] Store RegEqn to: none-> Freq: [ 1 ] Category List: [ ... ] Include Categories: [ {} ]
How to copy and paste on Ti-84 calculator?
You can copy and paste an equation that you get by using STAT CALC to the y= menu by using (after you calculate the equation) Y= VARS 5 (right arrow) (right arrow) ENTER
Will downloading games on my TI-84 Plus CE brick it/destroy it?
In general, no. Downloading games to your programmable calculator should NOT cause any damage, but as Kevin Gomez points out in his reply to this answer, you should be totally aware of your source.KNOW YOUR SOURCE !!!Is the source (author or collection site) one that you trust? Do they evaluate programs before posting them for others to download? If there are reviews available, read both top-rated and bottom-rated reviews to help you make your decision.BASIC is reasonably SAFEI’ve been writing programs in TI-BASIC for about two decades now, off and on. I am just about 100% certain that a BASIC program, even a badly written one, cannot harm your calculator.WHAT ABOUT ASSEMBLY/MACHINE LANGUAGE?if a program includes an assembly language component, it is possible for damage to result. Damage can result by accident, or it can be done deliberately.HISTORY?The same was true in the older computers (with less memory than the 84+ CE) that ran computer programs. Programs written exclusively in a high-level language like BASIC were very safe, but programs that included machine language or assembly language components were risky, then and now.Do you have the latest operating system (5.3) on your CE ?Check your MATH menu. Do you have the Piecewise(function) ?Check your PRGM environment. Do you have Cut and Paste ?If you do not have these features, upgrade your calculator’s operating system (education dot ti dot com).I was delighted when I discovered, by accident, that I had cut and paste. I’ve been wanting that feature for almost as long as I’ve wanted the Undo Clear option. I can remember many a time that I typed a long program statement then accidentally pressed Clear. With this new command option, I can immediately say “Oops!!!” and get my code back. (No, I don’t work for TI, I just love these new features.)You can see some of the differences between the Silver Edition and the CE here:Why the TI-84-Plus-CE is better than all the other TI-84's
How do you insert a fraction in a graphing calculator?
It depends on the graphing calculator. Old-As-DirtSupposing you have an old-as-dirt calculator, you'll need to become a master of division and modern order of operations.For simple fractions like 3/4, you can often just type 3/4 (using the division key). But if you're using it along with a higher ordered operation like a power, you'll need parentheses: (3/4). I usually put it in parentheses just out of paranoia.For complicated fractions, you'll need to put parentheses around the numerator and denominator.For example, [math]\frac{2+3}{3+4}[/math] must be entered as (2+3)/(3+4) or ((2+3)/(3+4)). If you enter it as 2+3/3+4, the calculator will return 7 instead of [math]\frac{5}{7}[/math].TI 84If you hit the alpha button followed by the Y= button, a menu pops up. One of the options is n/d (numerator over denominator.) This will give you the MATHPRINT fraction editor. Here, you can enter a write a fraction the way you are used to writing it.More Modern CalculatorsMost other modern calculators have a button on the front that's a box over a box, or [math]\frac{n}{d}[/math]. Both of these represent an "easy fraction entry" button.
What is the most extreme example of human willpower and discipline?
UioOne example that always stands out for me is the story of Shun Fujimoto. He competed in the 1976 Olympic Games as a gymnast and won gold in the team event. (I actually first heard about his story, before researching it, on Quora but I don’t seem to be able to find the answer - I guess this has just gone full circle)These Games may be more famous for Nadia Comaneci’s perfect 10, but this event is perhaps one of the most extreme displays of willpower I have seen by an athlete.So, Fujimoto took part in the floor exercise but ended up breaking his knee, and he was still due to take part in the pommel horse and on the rings. Knowing he had this injury still didn’t stop him however, because he didn’t want to let his team down by notifying them of his injury.He first went on to score 9.5 on the pommel horse, but he was still yet to do the rings - which if you can imagine dismounting from 8 feet in the air would only make the injury worst. And yet he soldiered on, without his team being full aware of his injury and ended up scoring 9.7 on the rings, sticking the landing with a perfect dismount. He used every ounce of his self-control to hold a perfect landing.One doctor said, “How he managed to do somersaults and twists and land without collapsing in screams is beyond my comprehension.”Shun Fujimoto after the Olympics with his gold medalHe would then fall to the ground in agony, before doctors eventually forced him to retire from any further events to prevent permanent disability. The dismount led to further injury as he suffered from ligaments tearing in his right knee and he dislocated his knee cap. Though he missed 3 events from the team competition thereafter (the parallel bars, vault and horizontal bars) his points were vital in winning gold for Japan.His great performances in the two events helped Japan win narrowly against the Soviet Union by only 0.400 points. (As a point of reference, East Germany in third place were more than 12 points behind first placed Japan).Incredible willpower mixed with a little stupidity or maybe you could say disregard towards his future career and health. And I’m sorry that I slightly took advantage of the word discipline and applied it to the gymnastics scenario, but this has to be one of the great moments in the Olympics.1976 Olympics gymnastics Shun Fujimoto
What formula does the TI-84+ use to calculate the line of the best fit for a set of points on a graph?
As you already know, the TI-84 has a number of different regression options on the TI-84+. I copied (merged) this menu on the TI-84 PLUS CE Graphing Calculator .I don’t know the exact method they use (their formula is probably proprietary), but I would imagine that it works similarly to the “least squares” method that is taught in Algebra, Statistics, Analysis, and other math courses.I don’t know of any actual function that looks at the points and tells you what type of regression function you should use with your data. Figuring out which method to use was a skill that was covered in several classes I took.Postscript:I recently found out that the TI-84 PLUS CE has been upgraded to operating system 5.3. The CE model has new features that are not available on the Silver Edition or any of the older 84’s. See this link for some of the comparisons:Why the TI-84-Plus-CE is better than all the other TI-84'sIf you already own an 84+, it doesn’t matter which one you use in class. You should be able to solve every problem on your 84 as I can solve on mine, BUT …… if you are thinking about which 84 to purchase, you should give lots of thought to spending the extra money to get the CE.For example, piecewise functions are easier to create on the CE:and the programming environment now has “Undo Clear” and “Cut and Paste” options:I don’t even know how to use the new sequence functions. The HELP menu didn’t define them.
How do you calculate the area under the graph cos x between 0 and pi/2?
How do you calculate the area under the graph cos x between 0 and pi/2?In addition to finding the answer by the methods that you were taught in class, and which you can see by reading the messages provided by other experts here on Quora, you can double-check your answer with a graphing calculator.Here is how I double-checked the answer using the TI-84 PLUS CE Graphing Calculator:Go to the [Y=] screen and enter the function: Y1 = cos(x)Go to the [window] screen and enter appropriate limitsPress [graph] to graph the sine wavePress [2nd] [trace] to bring up the [Calculate] menuChoose option 7 as shownWhen asked for the lower limitType 0 (Enter)When asked for the Upper LimitType π/2 (Enter)The area under the curve is graphed as shown, and the area is shown below the graph.Public Service Announcement:Article: Why the TI-84-Plus-CE is better than all the other TI-84'sIf you will be buying one of the TI-84 calculators, I highly recommend the newest CE model, which has features not present on the older calculators, including Piecewise functions, additional functions and keywords, seven times the user-memory, Cut-and-Paste, and Undo Clear (the latter two being new features in the Prgm environment).I aced five different college advanced math courses (Algebra, Trigonometry, Calculus 1 and 2, Statistics/Probability) using the Silver Edition and the CE. I was especially interested in new CE features I discovered while alternating between the SE and the CE while studying Statistics.I do own a TI-84 PLUS CE, an 84 Plus Silver Edition (which I no longer recommend), an HP Prime and an Nspire CX CAS, the latter two being CAS calculators.The CAS graphing calculators are fantastic, but when I want to calculate something, I reach for the CE first. I only get out one of the other calculators if I need an answer the CE does not give us.I do not recommend CAS calculators for doing math homework because they make homework TOO EASY, and as a result, you don’t learn as much from doing your work. Most math professors do not allow CAS calculators while studying math.This article: Why the TI-84-Plus-CE is better than all the other TI-84's , explains some of the features that are found on the CE that are not found on the Silver Edition or the older 83+ or 84+ calculators.