Unformatted text preview: c. Give the ﬁve number summary and explain brieﬂy how it reﬂects the shape of the distribution. d. Are there any outliers in the data? e. Construct a boxplot of the data. Again, explain brieﬂy how it reﬂects the shape of the distribution. 3. You are given n=10 measurements: 4 2 2 4 2 2 3 3 3 2. a. Calculate the sample mean. b. Calculate the sample standard deviation. c. Explain heuristically what information is given by the above quantities (ie. sample mean and standard deviation). d. Why do statisticians report the standard deviation and not the variance? 4. A sample of n=50 lifetimes for Canadian men is provided in the ﬁle “lifetimes.txt”. a. Calculate an appropriate measure of centre for this data set  make sure to justify your choice fully! b. What proportion of the sample survived to age 80? c. Is there anything unusual you notice about this data?...
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This note was uploaded on 12/22/2010 for the course MATHEMATIC Math 1131 taught by Professor Augustinewong during the Spring '10 term at York University.
 Spring '10
 AugustineWong
 Math

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