How to calculate $e^x$ with a standard calculator
网页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 = 2.717281828.
Find the standard matrix for a linear transformation
网页If you manage to obtain the identity matrix on the left, then you know the images of the vectors from the standard basis, which is sufficient to obtain the matrix of your linear transformation. (Since you're using column vectors, the result is the transpose of the matrix on the right. It is worth mentioning that some authors prefer row vectors ...
How do I combine standard deviations of two groups?
网页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 ...
can fractions be done on a regular caculator?
网页If you don't mind figuring out things like the least common multiple of the denominators of a set of unlike fractions before adding or subtracting them, etc., of course you can work with pretty much any calculator. But if you want an immediate answer without any extra thought or scratch-work, you need a calculator that can handle fractions.
Standard deviation sig figs - Mathematics Stack Exchange
网页2020年5月30日 · 1. $\begingroup$. Let's say I calculated a mean to be 2.475, but the data values had the least significant figure in the tenths place (i.e. 2.6, 2.8 etc.) so I round the mean value to 2.5 for correct sig figs. However, my standard deviation is 0.0835, and choosing my 1 sig fig for SD, I round to 0.08 So my SD is uncertain in the hundredths ...
Finding the standard deviation of a set of angles.
网页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. Rounding should always wait until the last step except when you know how much effect it will have on the bottom line.
Convert boolean expression into SOP and POS
网页One way to get the SoP form starts by multiplying everything out, using the distributive law: (ac + b)(a + b ′ c) + ac = ac(a + b ′ c) + b(a + b ′ c) + ac = aca + acb ′ c + ba + bb ′ c + ac = ac + ab ′ c + ab + ac = ac + ab ′ c + ab. Then make sure that every term contains each of a, b, and c by using the fact that x + x ′ = 1 ...
How Can I calculate the standard deviation of a yes/no question?
网页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".
number theory - Calculating the nth root in simple calculator ...
网页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 ...
How to know when to put calculator in radian or degree mode?
网页I should mention that for those first 4 problems, I think the point is actually not to use a calculator. The second part says ¨Find the function values. Round to four decimals places.¨: Cos 111.4° degree mode because there is a degree symbol. Sin(-18°) degree mode because there is a degree symbol