Recent content by fed2

  1. fed2

    disjoint and dependent events

    my vote is yes, they are dependant. independance means prob A and B = prob A * prob B. so disjoint then we have 0 = prob A * Prob B, which won't hold except in stupid situations.
  2. fed2

    Probability of 0-3 and player scores a hat trick

    seems like odds of getting a hat trick (>=3 goals?) is not going to be independent of number of goals scored. so bascially i don't think theres going to be any way to tell given your data. that 0.05 is marginal, ie computed over all # of goals scored per game. If the probablities were...
  3. fed2

    Is this group of data different from the rest: From ANOVA to...

    yeah i was thinking that would be a good idea. you mean average or sum across trials? this makes the analysis alot easier. I think it is probably ok,
  4. fed2

    Power Calculation

    I think what you got to do here is 1) get exact confidence interval on prob of AE in you 6 people. 2) prob of any AE in 30 = 1 - (1 - prob of AE)^30, 30 = 60/2 3) take upper and lower limits from part 1 and plug into 'prob of AE' in 2 You made a 95% Confidence limit on the prob of any AE in...
  5. fed2

    Probability of a Pair of Fish!

    could be that the fish monger jest intentionally makes the fish bags of the 4 types in equal proportions and passes them out as such, then wagtail is right. hed have some fish left-over though.
  6. fed2

    Is this group of data different from the rest: From ANOVA to...

    I think the thing here is that the experiment is 'doubly repeated'. there is going to be presumably some correlation between different 'trials' on the same pig, similar to time effects in usual repeated measures setting, and also some correlation between feed consumption on the same day (a pig...
  7. fed2

    residual analysis

    if you have any residual analysis left on after you are done, you should wipe it down with a clean microfiber cloth. good as new!
  8. fed2

    Average number of points and wins given a win rate.

    Problem is that is only if there are exactly 4 trials ya know. jest googles 'negative binomial distribution' and use that formulas in excel. You actually might be able solve it using something close to what you iz doing above, but will be more tedious. Q: How will you know if you are right...
  9. fed2

    Average number of points and wins given a win rate.

    i think you is goin' to haf too use a negative binomial distribution to reckon the number of trials to your third loss. keep in mind that if the number of trials is >= 10 then you got 7 wins. the part about 'Then we get the probability of getting each point by multiplying the points by the...
  10. fed2

    Help understanding and solve these exercises!

    for 1a is going to be product of the probability that each of the three trials shows an effect. probably your notes say 'product rule' or something like that. for 1b, similar, but is going to be one minus product of probability that each trial shows no effect. Your notes say something like...
  11. fed2

    Law of total variance Var(Y) = E(Var(Y|X))

    what sorts of distributions have 0 variance?
  12. fed2

    How do I analyze data in relation to employee non cash rewards?

    Hmmm, so what numbers are you going to compare to determine whether buisness performance improved. Profit before/after you intervention, or what?
  13. fed2

    How do I analyze data in relation to employee non cash rewards?

    are you surverying more than one employee in the same buisness? Do all employees within each buisness all get/not get non-cash incentives, or is it a mixture in each buisness? How many buisnesses
  14. fed2

    Calculate the error

    your going to need the covariance between m and c as well.
  15. fed2

    Interpretation of statistical test (2x2xk contingency table)

    adverse events are usually tabulated in a certain way, according to most related, most severe, treatment emergent and stuff like that. i though id mention it since thats going to come up at some point.