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Lecture

# S2MB3 2012 T2 A1.pdf

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McMaster University

Statistics

STATS 2MB3

Y.Guo

Winter

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STATS 2MB3 STATISTICAL METHODS
Assignment 1 Due during class on Friday January 27th, 2012
Late assignments will not be accepted
Questions 1-4 should be completed without the aid of a computer. Question 5 should be done in R.
Q. 1 Devore 1.20
Q. 2 The following is the number of games played each year in the NBA by Robert Parish through-
out his career.
77 82 76 72 82 80 78 80 79 81 80
74 80 79 81 79 79 74 81 74 43
(a) Create a repeated stem-and-leaf plot for the data. Split the data to have an upper and
lower half (i.e., repeat each leaf twice, one for the lower values 0{4, one for the upper
values 5{9)
(b) Calculate the 5-▯gure summary and draw a boxplot of the data
(c) Describe the distribution in terms of shape, location, spread and any unusual features
(d) Calculate the mean and standard deviation of the number of games played. Would you
prefer to use these measures or the median and interquartile range to describe location
and variability of this dataset?
(e) Calculate both the 5% and 20%, trimmed and winsorized means for this dataset.
Q. 3 30 participants are given a dexterity test with both their left and right hand, the scores are
recorded belo

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