Mr. Rogers - AP Statistics Objectives
 Unit Plan Practice Test Practice Test Answers
 AP Statistics  Normal Distribution Chapter 2 Practice Questions 1 ) What percent of the data is contained within +1 and -2  standard deviations of the mean? 2 ) If the interquartile range of a data set is 200 what is the best estimate of standard deviation? 3 ) If the average verbal SAT score is 500 and the standard deviation is 100, what % of the SAT test takers score above 700? 4 ) Average IQ in the U.S.A. is 100 with a standard deviation of 15 and is normally distributed. What percent of the population has an IQ above 70? 5 ) Using the normal distribution, what is the probability of finding an individual with an IQ between 85 and 145? 6 ) What is the smallest amount of data contained within plus or minus 3 sigma of the mean, given any distribution? a) 34%        b) 68%       c) 75%        d) 89%        e) 93% 7 ) Where are the 2 inflection points found on a normal distribution? 8 ) What is the z-score corresponding to Q1 of a box and whiskers plot? 9 ) For normally distributed data a normal quantile plot will appear to be ________________. 10 ) Draw a box an whiskers plot for normally distributed data. 11 ) Draw an ogive for a normal distribution. 12 ) Given the 5 number summary  2, 3, 7, 11, 12 is the distribution normal? 13 ) Given a normal quantile plot, how can you tell if the distribution is normal? 14 ) What is a density curve? 15 ) What is the difference between pdf and cdf? 16 ) What is the actual range of a normal distribution? 17 ) What is the estimated range for normally distributed data? 18 ) Given  that IQR = 6, what is the standard deviation. (assume normally distributed data) 19 ) Given the following 5 number summary  1, 6, 7, 8, 13 draw an ogive. Is the data normally distributed? Why or why not? 20 ) For normally distributed data the mean = 50 and the standard deviation = 10. Draw an ogive for the data. Find the IQR
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