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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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