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# MAT121-2007Fall - MAT 121 Fall 2007 Final E xam Name D...

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MAT 121 Fall 2007 Final Exam December 10, 2007 Name:______________________________ Directions: Students must complete all test questions. The use of textbooks is allowed, but notes not in the textbook are NOT allowed. Students are also allowed the use of a calculator. All work, other than direct calculations done on a calculator, MUST be shown. A correct answer with no work shown will receive NO credit.

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1. The following is a stem-and-Ieaf plot of the scores on a midterm of large statistics class of 58 students. Stem 3 4 5 6 7 8 9 10 Leaf 0 013489 345678 12289 00112234457888999 01233333344577888999 000 (a) Calculate the median and the mode for the above data set. (b) Make a boxplot for the the above data set. (Be sure to show any calculations that you use.)
2. Given below are the numbers of students in ten different MAT 121 recitations. 16 12 17 18 20 18 17 15 17 17 (a) Calculate the mean of the sample. (b) Calculate the standard deviation of the sample. (c) Calculate the variance of the sample. (d) Does the sample contain any outliers? Use z-scores to justify your answer.

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MAT121-2007Fall - MAT 121 Fall 2007 Final E xam Name D...

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