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Chapter Two

Chapter Two. Evan E. Amanda W. and Yunying Z. . Question. What is the true name for the 68-95-99.7 rule? Empirical rule Normal distribution Mean . Answer. A. Empirical rule . Question.

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Chapter Two

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  1. Chapter Two Evan E. Amanda W. and Yunying Z.

  2. Question What is the true name for the 68-95-99.7 rule? • Empirical rule • Normal distribution • Mean

  3. Answer A. Empirical rule

  4. Question • What is An idealized description of overall pattern of the data but ignores minor irregularities as well as any outliers? • A. Normal probability plot • B. Mathematical model • C. Inflection points

  5. Answer B. Mathematical model

  6. Question What is a curve that always lies on the horizontal axis with an area of exactly one? (the area under the curve and above any range of values is the proportion of all observations that fall in that range) • A. Normal probability plot • B. Mathematical model • C. Density curve

  7. Answer C. Density curve

  8. Question Divides the area under the curve in half.’ A. Mean B. Median C. Mode

  9. Answer B. Median

  10. Question The point at which the curve would balance if made of solid material. • Normal probabilityplot • Standardized value • Mean

  11. Answer C. Mean

  12. Question All the possible result in an experiment. • Outcomes • Proportions • Simulations

  13. Answer A. Outcomes

  14. Question Conducting an experiment but not actually doing the experiment. • Null hypothosis • Simulation • Matched pairs

  15. Answer B. Simulation

  16. Question What do we call a sample that produces a normal curve? A. Categorical variable B. T-test C. Normal distribution

  17. Answer C. Normal distribution

  18. Question What is the point at which the curve (starting from the peak) goes from falls ever more steeply to falling ever less steeplycalled? • Skewed • Mu • Inflection points

  19. Answer C. Inflection points

  20. Question What is a measure of how much a value “x” is away from the mean, in terms of standard deviations? • Standardized value • Z-score • Bias

  21. Answer A. Standardized value

  22. Question A Normal distribution with N(0,1). • Outlier • Standard normal distribution • Center

  23. Answer B. Standard normal distribution

  24. Question An assessment of the adequacy of the normal model. • Normal probability plot • Spread • Parameter

  25. Answer A. Normal probability plot

  26. Extra Terms and Symbols to Know! • Mu = mean sigma = µ • σ = standard deviation • Z-score = Number of standard deviation from the mean

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