final-CHEAT SHEET

final-CHEAT SHEET - TRUE/FALSE When performing test of...

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TRUE/FALSE - When performing test of significance, test statistic always follows normal distribution – FALSE - When performing test of significance, P-value gives chance that null hypothesis is true – FALSE - When sampling from population, method of choosing sample matters a lot regardless of sample size – TRUE - In a long series of measurements, bias can easily be detected – FALSE - Deck of cards is shuffled, chance that the top card is the J of clubs or the bottom card is the J of diamonds is 2/52 - FALSE - In observational study, effects of treatment may be confounded w/ effects of factors that got subjects into groups in the first place – TRUE - Null hypothesis assumes that observed difference is due to chance – TRUE - If correlation coefficient is 0.9, then 90% of points are highly correlated – FALSE FILL-INS - . - Fair die rolled some number of times, and you win $1 if it shows an ace less than 12% of the time. Which is better, 60 rolls or 600 rolls? - The table value for a chi-square test of independence based on a 2 by 3 table w/ significance level .01 is 9.21 . - Box contains 10,000 tickets. Avg = 50, SD = 20. 100 draws @ random w/ replacement. Avg is around 50 give or take 2 or so. MULTIPLE CHOICE If you are in the 58 th percentile, it means: higher than the average: NO 58% scored lower than you: YES higher than the median: YES physics average = 60; math average = 60. SDs equal. Of students w/ 75 on M, LESS THAN ½ were >75 on P.
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final-CHEAT SHEET - TRUE/FALSE When performing test of...

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