Stat 231 HW Assignments Fall 2010

# Stat 231 HW Assignments Fall 2010 - Stat 231 Homework...

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1 Stat 231 Homework Assignments/Fall 2010 HW1/ Due 8/26/10 1. Do Devore Chapter 1 Problem 42. 2. Do Devore Chapter 1 Problem 51 "by hand." That is, do the arithmetic required to compute the sample variance and sample standard deviation. Check your computations using a good scientific calculator (you need to know how to compute means and standard deviations using your calculator). Be sure to write correct units for 2 s and s . 3. Do Devore Chapter 1 Problem 64 "by hand." That is, do the arithmetic required to compute the two sample means and two sample standard deviations. Check your computations using a good scientific calculator (you need to know how to compute means and standard deviations using your calculator). Be sure to write correct units for the x and s values. 4. Load the data from Devore's Example 1.9 into JMP . Use the Analyze>Distribution function to get, print out, and turn in with this homework a JMP report that includes a) a histogram matching the one in the text as closely as is possible (run the data axis from 1 to 19 and use increments of 2), b) a quantile box plot, c) a stem and leaf plot, and d) the sample mean and standard deviation for these data. 5. Load the data from Devore Chapter 1 Problem 75 into JMP . Use the Tables>Stack function to get the data values into a single column and the labels into another one. Then make, print out, and turn in with this homework the comparative (quantile) box plots Devore asks for in two different ways. a) Use the Analyze>Distribution function plotting Data by Label and then using horizontal layouts to stack the JMP reports over one another. b) Use the Graph>Graph Builder function, plotting Data on the "y" axis and Label on the "x" axis, and then adding the box plots. HW2/Due 9/2/10 Do Devore Chapter 2 Problems 1,3,5,8,11,12,14,15,19,20,26,47,48,52,53,63,67. HW3/Due 9/9/10 Do Devore Chapter 2 Problems 29,32,34,38,71,77,78,79,80. Do Devore Chapter 3 Problems 11,12,13,22,23,29,31,35,36,39.

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2 HW4/Due 9/16/10 1. Use JMP and make "spike graphs" to the same scale for probabilities from all of the following discrete distributions: a) the Binomial distributions for 5 n and .1,.2,.5,.8 p , b) the Geometric distributions for .1,.2,.5 p , and c) the Poisson distributions for .5,1,2,4 . Make these plots of probability mass functions   vs f xx for 0,1,2, ,19 x . You can do this by a) adding 20 rows to an initial data table and creating a first column (label it " x ") using a formula that is Row()-1 (this gives " 1 row number " ) (you'll find " Row " under the grouped " Row " functions menu in the " Formula " menu), b) adding columns to the data table for each of the distributions indicated above (you'll find appropriate probability mass functions under the grouped " Discrete Probability " functions menu in the " Formula " menu) 1 , and c) using the Graph Builder function with x on the horizontal axis and the various probability function values on the vertical axes. If you right-click on each graph, you'll be able to remove the " smoother " and add " bars " to make the desired plots.
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## This note was uploaded on 02/11/2012 for the course STAT 231 taught by Professor Staff during the Fall '08 term at Iowa State.

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Stat 231 HW Assignments Fall 2010 - Stat 231 Homework...

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