Recent content by AngleWyrm

  1. AngleWyrm

    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. AngleWyrm

    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. AngleWyrm

    Help writing hypotheses!

    yes, the two standard deviations are part of the denominator. The MATH thing doesn't seem to be translating LaTex.
  4. AngleWyrm

    Help writing hypotheses!

    Statistics Knowledge Portal corellation(x,y) = covariance(x,y) / standard deviation(x) * standard deviation(y)
  5. AngleWyrm

    Help writing hypotheses!

    correlation and p values
  6. AngleWyrm

    Help writing hypotheses!

    There are four possible outcomes to a hypothesis test
  7. AngleWyrm

    Help writing hypotheses!

    That's a decision threshold you must choose, typically selected as 0.05 For example:
  8. AngleWyrm

    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. AngleWyrm

    Random variable

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

    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.
  11. AngleWyrm

    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...
  12. AngleWyrm

    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.
  13. AngleWyrm

    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); }
  14. AngleWyrm

    Income Inequality Data

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