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Which Test?

Which Test?. Planning a Study. Exploring Data. Statistical Inference. Anticipating Patterns. 100. 100. 100. 100. 100. 500. 400. 300. 200. 500. 400. 300. 200. 400. 400. 200. 300. 300. 500. 300. 200. 500. 200. 400. 500. End Game.

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Which Test?

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  1. Which Test? Planning a Study Exploring Data Statistical Inference Anticipating Patterns 100 100 100 100 100 500 400 300 200 500 400 300 200 400 400 200 300 300 500 300 200 500 200 400 500 End Game

  2. Null hypothesis in Linear Regression Test using symbols (not words) 100 Check Answer

  3. What is Ho: β1 = 0? 100

  4. One-sample procedures are applied to a set of normally distributed differences from two dependent samples 200 Check Answer

  5. What is a matched-pair t-test? 200

  6. Testing the average SAT scores of males vs. females from a sample of 50 each at OHS 300 Check Answer

  7. What is a two-sample t-test for means? 300

  8. A sample of 50 senior female heights were tested against the nationally stated average of 5’6” 400 Check Answer

  9. What is a one-sample t-test for mean? 400

  10. Also known as a test of homogeneity of proportions 500 Check Answer

  11. What is a Chi-Squared Test? 500

  12.  = 125,  = 10, and x = 150, then z = ? 100 Check Answer

  13. What is z = 2.5? 100

  14. Of this type of distribution the relationship of mean, median, and mode is: mode > median > mean 200 Check Answer

  15. What is right-skewed distribution? 200

  16. Data of this kind can be displayed using pie charts, bar charts, or segmented bar charts 300 Check Answer

  17. What is categorical (qualitative) data? 300

  18. This indicates the calculated linear model is not of good fit 400 Check Answer

  19. What is a pattern in the residual plot, non-linear trend in scatterplot, or very low r2 value? 400

  20. This happens when the line overestimates the actual outcome 500 Check Answer

  21. What is a negative residual? 500

  22. Most useful in establishing cause-and-effect relationships 100 Check Answer

  23. What is a controlled experiment? 100

  24. Sampling everyone in a classroom from a random selection of classrooms 200 Check Answer

  25. What is clustering? 200

  26. This is used in experiments to reduce variation from extraneous factors by creating similar groups 300 Check Answer

  27. What is blocking? 300

  28. These are the three main components of a well-designed experiment. 400 Check Answer

  29. What is randomization, control, and replication? 400

  30. These are the 3 main types of bias in sampling procedures. 500 Check Answer

  31. What is selection bias, non-response bias, and response bias? 500

  32. E(X) = 8, sx = 3, E(Y) = 20, and sy = 4 What is E(Y – X) and sy-x? 100 Check Answer

  33. What is E(Y – X) = 20 – 8 = 12 and sy-x = (32 + 42) = 5? 100

  34. Formula for the mean value of a discrete random variable x 200 Check Answer

  35. What is x = xp(x), where x is a numerical outcome and p(x) is the assigned probability for that x outcome? 200

  36. The Empirical (68-95-99.7) Rule can only be used when this is known about the data. 300 Check Answer

  37. What is a normal distribution? 300

  38. These are the 3 outcomes from the Sampling Distribution of X-bar and Central Limit Theorem. 400 Check Answer

  39. What is 1. X-bar = X 2. X-bar = X/n 3. n must be sufficiently large (generally n  30) NO matter the parent population’s distribution? 400

  40. These are the 3 outcomes from the Sampling Distribution of p (proportion) and Central Limit Theorem. 500 Check Answer

  41. What is 1. p =  2. p = ((1-)/n) 3. n must be sufficiently large (np  5 and n(1-p)  5 ) ? 500

  42. Under what conditions would it be meaningful to construct a CI when the data consist of the entire population 100 Check Answer

  43. What is never? 100

  44. Rejected null hypothesis when it was actually true 200 Check Answer

  45. What is Type I Error? 200

  46. Estimated standard deviation of the statistic 300 Check Answer

  47. What is standard error of a statistic? 300

  48. Doing this divides the confidence interval size by 1.414 400 Check Answer

  49. How does doubling the sample size change the CI size? 400

  50. Sample size needed to obtain a 95% confidence with a margin of error of 4% for a percentage of voters 500 Check Answer

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