How to calculate standard deviation? - Mathematics Stack Exchange
Jun 19, 2019 · It would be easy with a graphing calculator, but I only have TI-30XA scientific calculator that can't do much. Can someone teach me a faster way to calculate the standard …
What am I plugging in wrong to my normal distribution calculator?
Standard Deviation = 0.1 (i.e. I have also tried plugging in Standard Deviation = .1/sqrt (7)) Probability = ? Unfortunately, I am getting the incorrect answer of 0.00003. Not only this, but …
Finding the standard deviation from data grouped by intervals
Dec 27, 2020 · Continued for all 100 values to the calculate the deviation for each... Then calculating the standard deviation with σ=√ ( (Σ (x-µ)^2)/2). This formula once everything has …
How to calculate quartiles with only standard deviation and mean ...
I am trying to understand how, using only the standard deviation and mean, you are able to determine the first and third quartiles on a normal distribution. I get that the area under the …
finance - Financial Calculator HP 10bII - Standard Deviation with ...
I have a financial calculator and am trying to use it to calculate the standard deviation when probability is involved. For a standard deviation question say on the numbers $1$, $5$, $6$, …
statistics - Calculating Standard Deviation on 2 Independent …
Calculating Standard Deviation on 2 Independent Random Variables and More Ask Question Asked 9 years, 2 months ago Modified 9 years, 2 months ago
How to calculate standard deviation from mean and probability?
The formula for standard deviation is sqrt ( [sample size] [probability of success] (1- [probability of success])). To find the sample size from the mean and success rate, you divide the mean by …
Why is there not a simpler way to calculate the standard deviation?
However, when you calculate the standard deviation of a sample, you have to estimate the population mean that would normally be in the formula with the sample mean. Doing so …
Multiplying two averages, what to do with the deviations?
Both X1 and X2 also has their own standard deviation values, D1 and D2. How can I calculate the standard deviation value D3? My concrete sample problem to illustrate the use-case I have …
Using a TI-84 calculator to find the lowest 20% of a normal curve
Feb 14, 2017 · Given a normal distribution of values for which the mean is 70 and the standard deviation is 4.5. Find the probability that a value is between 65 and 80 using your TI calculator.