# Recent content by AngleWyrm

1. ### Help with experience-sampling data analysis plan and multilevel linear modelling

So it's a measurement that can change over time, and you're interested in the rate of change, aka acceleration. enjoyment / sessionTime^0 = location enjoyment / sessionTime^1 = velocity enjoyment / sessionTime^2 = acceleration
2. ### Standard deviation of an average of a number of results

The data given isn't normally distributed It's skewed by 0.5395 and so calculations on the area beneath the curve will have to take that into account.
3. ### Help writing hypotheses!

yes, the two standard deviations are part of the denominator. The MATH thing doesn't seem to be translating LaTex.
4. ### Help writing hypotheses!

Statistics Knowledge Portal corellation(x,y) = covariance(x,y) / standard deviation(x) * standard deviation(y)
5. ### Help writing hypotheses!

correlation and p values
6. ### Help writing hypotheses!

There are four possible outcomes to a hypothesis test
7. ### Help writing hypotheses!

That's a decision threshold you must choose, typically selected as 0.05 For example:
8. ### Help writing hypotheses!

Two hypotheses, stated as the opinion hypothesis vs it's alternative: H1: There is a positive correlation between FDS and SAS H0: There isn't a positive correlation between FDS and SAS H1: There isn't a correlation between FDS and STAI H0: There is a correlation between FDS and STAI The p...
9. ### Random variable

Binomial Distribution Mean μ = np Variance σ2 = npq Standard Deviation σ= √(npq)

11. ### The optimal number of response categories in the Likert scales

Example product on Steam, 4x strategy game Stellaris There's a show graph button in the upper right for a more detailed look at the results.
12. ### The optimal number of response categories in the Likert scales

The best implementation of a Likert scale that I've seen is used by the software distribution platform Steam. It uses a 2-point scale, yay or nay. The aggregation of votes on a purchased product constitute the user rating, which categorizes the tally as { very positive, somewhat positive, mixed...
13. ### Need help on a statistical algorithm.

To change location and scale of any value x newX = (oldX - shiftLocationX) / scaleX skew = (mean - median) / standardDeviation mean = median + skew * standardDeviation To generate a normal distribution from a random variable, take a bell curve and flip it on it's side.
14. ### Need help on a statistical algorithm.

double shapedRNG(Random rng, double alpha, double beta){ double x = rng.nextDouble(); return x^(alpha-1) * (1-x)^(beta-1); }
15. ### Income Inequality Data

The majority of countries use different currencies, and have their own governments that do data gathering.