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Exam I Answers - 1016-319: Data Analysis I Exam I Long A 1....

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1016-319: Data Analysis I Long E x a m I A 1. (10 pts.) Given the Histogram below what can be said about it? Please put an X on the line next to all correct statements: ____The histogram is positively skewed. _X_ The histogram is negatively skewed. _X_The median is larger than the mean. ____The median is less than the mean. _X_The mode is larger than the mean. ____The mode is less than the mean. _X_ Although slightly skewed, the histogram represents an approximately normal distribution ____The standard deviation would be unequal and different on each side of the mean. Page 1
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1016-319: Data Analysis I Long E x a m I A 2. (20 pts.) The SAT scores for 900 female and 800 male college freshman are classified as low, medium, or high: Range Men Women High 190 250 Medium 430 520 Low 180 130 A. Use this data to develop a complete and detailed Relative Frequency Table (for Men and Women). You will be graded on the format, clarity, and accuracy of your table. The table below is provided for your convenience. It is not meant to imply that you need the number of rows or columns filled, BUT YOU MUST USE THIS TABLE. Range Men Women Freq. Rel. Freq. Freq. Rel. Freq. High 190 24% 250 28% Medium 430 54% 520 58% Low 180 23% 130 14% Total 800 101% 900 100% B. Answer the following Questions: 1. What proportion of males would you expect to have a Low to Medium Score? .77 +/- 0.01 2. This number compares to what proportion for females with the same expected score range? .72 +/- 0.01_ Page 2
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This homework help was uploaded on 04/18/2008 for the course MATH 1016.319.0 taught by Professor Dataanalysisi during the Spring '08 term at RIT.

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Exam I Answers - 1016-319: Data Analysis I Exam I Long A 1....

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