How to calculate $e^x$ with a standard calculator
If x is not too big, you could try approximating ex as (1 + x / n)n for some large n (not too huge, or you run into roundoff error). Somewhat better is (1 + x / n + x2 / (2n2))n. For example, with x = 1 and n = 1000, (1 + 1 / 1000 + 1 / (2 ⋅ 10002))1000 ≈ 2.718281376; the correct value is e …
Find the standard matrix for a linear transformation
Let me propose an alternative way to solve this problem. There is a neat formula exactly for your case presented in "Beginner's guide to mapping simplexes affinely" and "Workbook on mapping simplexes affinely". L (p ) = (−)det 0 p1 p2 p3 x a1 a2 a3 y b1 b2 b3 z c1 c2 c3) where →L is linear transformation acting on arbitrary point →p. →L ...
Finding the standard deviation of a set of angles.
1. Your first number is 39 + 15 60 + 1 602 = 39.250277777 … 39 + 15 60 + 1 60 2 = 39.250277777 …. Deal similarly with the others. And remember to do as little rounding as possible at least until the last step.
How Can I calculate the standard deviation of a yes/no question?
2020年11月29日 · Is it possible to calculate the standard deviation of a single yes/no question? For example, 100 people took the survey and 60 of them chose "yes", 40 of them chose "no".
How do I combine standard deviations of two groups?
2018年10月26日 · According to the second formula we have Sb = √(n1 − 1)S21 + (n2 − 1)S22 = 535.82 ≠ 34.025. To be fair, the formula S′b = √ (n1 − 1) S2 1 + (n2 − 1) S2 2 n1 + n2 − 2 = 34.093 ≠ 34.025 is more reasonable. This is the formula for the 'pooled standard deviation' in a pooled 2-sample t test. If we may have two samples from ...
Standard deviation sig figs - Mathematics Stack Exchange
2020年5月30日 · If your data is rounded to one decimal, each item is uncertain by ±0.05 ± 0.05. The variance of the uniform distribution of total width 0.1 0.1 is 1 12 ⋅0.12 1 12 ⋅ 0.1 2. The variance of the sum of N N items is then N1200 N 1200. The standard deviation of the mean is about 1 35 N√ 1 35 N. You can use this as a guide on how many ...
number theory - Calculating the nth root in simple calculator ...
Step1. Press the square root button 13 times. Step2. subtract 1 from it. Step3. divide by 3, Step4. add 1 to it. Step5. Press these keys x,= 13 times and you will get the cube root of the number. On asking these to my maths teacher , in addition to these he told me that how to take out nth root [if we want to take out 7th root of 128 which is ...
statistics - Calculating standard deviation without a data set ...
2018年1月25日 · Hint: You need a formula, where you can enter the sum of squares and the square of the sum. Let us first define these as follows: SSQ =∑k=1n x2 k and SQS =∑k=1n xk. Var(X) = 1 n ∑k=1n x2 k −(1 n ∑k=1n xk)2 = SSQ n −(SQS n)2. The (population) standard deviation, therefore, is. SD(X) = SSQ n −(SQS n)2− −−−−−−−−− ...
can fractions be done on a regular caculator?
2014年7月3日 · But if you want an immediate answer without any extra thought or scratch-work, you need a calculator that can handle fractions. Note that not all scientific calculators can handle fractions natively. The ones that can have a special fraction key, e.g. the Casio that I used a long time ago in school had an "a b/c" key that allowed you to enter ...
calculator - Why doesn't my TI-84 give me an exact value when ...
2017年11月6日 · The calculator automatically uses scientific notation for numbers smaller than $0.001$ in absolute value, no matter what your mode settings are; this cannot be overridden. The most straightforward way to get the calculator to immediately tell you how many zeroes there are after the decimal, in such a case, is to add $1$: