MGTSC312 Midterm: Study Notes Exam 3

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You could be given excel descriptive statistics and a variance/covariance matrix. The following practice exercise pertain to a sample of 30 countries. Know how to deal with pearson product moment correlations and simple regression and also multiple regression. Consider the following variance-covariance matrix produced using excel with a sample of 30 countries (not the smaller number of countries used in another example -- be sure to use results for the specified sample): Be sure you know that the values down the diagonal are sample variances. Be sure you know that the values off the diagonal are sample covariances. Here the sample variance of babymort is 297. 71, the sample variance of immune is 68. 61 and the sample covariance for. To find the correlation, divide the covariance by the product of the standard deviations for the variables. The standard deviation of baby|mort is the square root of 297. 71 which is approximately 17. 25.

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