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AP Statistics Chapter 2 review “Are you feeling normal today?”

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1) The scales of density curves are adjusted so that the total area under each curve is what? 1.πr 2 2.1 3..50 4.99.7% 1234567891011121314151617181920 21222324252627282930

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2) What is the relationship between the mean and the median of a symmetric density curve? 10 1.Mean > median 2.Mean = median 3.Mean < median 4.Husband and wife 1234567891011121314151617181920 21222324252627282930

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3) The symbol μ represents what in statistics? 1.The population mean. 2.The sound a cow population makes. 3.The population standard deviation. 4.The population median. 10 123456789 11121314151617181920 21222324252627282930

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4) Which of the following does not describe the overall shape of a normal curve? 1.Symmetric 2.Single-peaked 3.Bell-shaped 4.Parabolic VOTE 1234567891011121314151617181920 21222324252627282930

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5) Interpret the notation N(100,15). 1.Normal distribution with 100% of data between standard deviation of 15. 2.Nice distribution with n = 100 and mean = 15. 3.Normal distribution with mean 100 and standard deviation 15. 4.Nice distribution with mean 100 and standard deviation 15. 10 123456789 11121314151617181920 21222324252627282930

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A normal distribution of scores has a mean of 92 and standard deviation of 8. If you had a score of 104, what would be the z-score? 1234567891011121314151617181920 21222324252627282930 10 Seconds Remaining 1.0.9 2.1.5 3.-0.75 4.-1.5

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7) Mr. Hammond missed 12% of the questions on the biology test. This means that… 1.His score is the 12 th percentile. 2.His score is the 88 th percentile. 3.His z-score is 12. 4.None of the above is necessarily true. 10 123456789 11121314151617181920 21222324252627282930

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8)Precalculus test: μ = 60, σ = 12 AP Statistics test: μ = 58, σ = 5 Mr. Brownson scored 72 in Precalc and 68 in AP Stats. In which class did he do better? 1.Precalculus 2.AP Statistics :10 1234567891011121314151617181920 21222324252627282930

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9) What does it mean when a z-score is negative? 1.The data is skewed to the left. 2.The median is smaller than the mean. 3.The data entry is below the mean. 4.The data contains a lot of put-downs. 10 123456789 11121314151617181920 21222324252627282930

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Participant Scores 900Participant 8 900Participant 2 900Participant 9 900Participant 17 900Participant 13

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10) What conclusion do you come to if a normal probability plot is linear? 1.The data is normally distributed. 2.The data is not normally distributed. 3.The data can be fitted with a linear model. 10 1234567891011121314151617181920 21222324252627282930

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11) What z-score indicates the 70 th percentile? 1..70 2..52 3..30 4.-.52 10 123456789 11121314151617181920 21222324252627282930

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12) Which of the following can be used to determine if data is normally distributed? I. Make a histogram II. Check the 68-95-99.7% rule III. Make a normal probability plot 10 1.I only 2.II only 3.III only 4.I and II only 5.II and III only 6.I and III only 7.I, II, and III 1234567891011121314151617181920 21222324252627282930

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13) What is the percentage of data that falls within two standard deviations in a normal distribution? 1.50% 2.68% 3.95% 4.99.7% 5.100% 10 Seconds Remaining 1234567891011121314151617181920 21222324252627282930

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A standard normal table (Tbl A) shows the percentage _?_ the standard score. 10 123456789 11121314151617181920 21222324252627282930 1.Above 2.Below 3.In between

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Participant Scores 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5

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