prac8stat - QUEEN MARY UNIVERSITY OF LONDON MTH 4106...

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Unformatted text preview: QUEEN MARY, UNIVERSITY OF LONDON MTH 4106 Introduction to Statistics Practical 8 6 March 2012 Today we will • see how Minitab simulates data from standard distributions, • become more familiar with covariance and the correlation coefficient, • verify some theorems from lectures in particular cases. 1 (Simulating data from a Poisson distribution) Suppose that X 1 ∼ Poisson(4). Use Calc → Random Data → Poisson ... to simulate 200 rows of data from this distribution, and store them in a column named X1 . Before you go any further, write down E ( X 1 ) and Var( X 1 ). Now use Stat → Basic Statistics I Display Descriptive Statistics ... to find out the sample mean of X1 and the sample variance of X1 . Are they close to the theoretical values that you wrote down? 1 2 (Drawing a histogram) A histogram gives a good visual impression of a probability mass function. You can get the simple histogram for X1 by using Graph → Histogram ... ....
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This note was uploaded on 03/12/2012 for the course MTH 4106 taught by Professor R.a.bailey during the Spring '12 term at Queen Mary, University of London.

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prac8stat - QUEEN MARY UNIVERSITY OF LONDON MTH 4106...

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