Lab 6 - Name: Friday T.A. name/Class time:XiangHan...

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Name: October 8, 2010 Friday T.A. name/Class time: Xiang Han Monday/Wednesday lecturer: Ellen Gundlach Lab 6: Chapter 6 and Section 7.1 Do poets die young? According to William Butler Yeats, “She is the Gaelic muse, for she gives inspiration to those she persecutes. The Gaelic poets die young, for she is restless, and will not let them remain long on earth.” One study designed to investigate this issue examined the age at death for writers from different cultures and genders. The ages at death for female poets from North America are given in the SPSS data file “age.sav”. Most of the writers are from the United States, but Canadian and Mexican writers are also included. We will assume that these poets represent a simple random sample of poets from the population. 1. Look at the data. a) (1 point) What is the sample size? 32 b) (1 point) What is the sample mean? 63.1875 approx.= 63 c) (1 point) Show a histogram of the data. Comment on any important features. The major thing to point out about this histogram is the huge column for 70, which is a little higher than the mean. 1
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d) (1 point) Show a Normal quantile plot of the data. Comment on any important features. The data points follow very closely to the line showing that it is normally distributed. The last point at the top appears to be an outlier. 2. From previous studies, you believe the population standard deviation is 16 years. a) (4 points) Based on the data, conduct a hypothesis test (with a 0.05 significance level) to see if there is evidence that the population mean age of death for poets is
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This note was uploaded on 11/08/2010 for the course STAT 301 taught by Professor Staff during the Spring '08 term at Purdue.

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Lab 6 - Name: Friday T.A. name/Class time:XiangHan...

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