ARTSSCI 2R03 Lecture Notes - Lecture 22: Scatter Plot
24 Apr 2018
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Lecture 22 - statistical association between two variables. Example 28. 1: consider the temperature x (degrees celsius) measured in a chemistry experiment. Suppose x has mean x = 350 degrees celsius and standard deviation x = 8 degrees celsius. Obtain the mean and standard deviation of y, the temperature in degrees fahrenheit. Y = 32 + 9/5x = 9/5x + 32 (a = 9/5, b = 32) Y = e(y) = e(9/5x + 32) = 9/5e(x) + 32. = 9/5 x 350 + 32 = 662 degrees fahrenheit. 2 = var(y) = (9/5)^2 var(x) = (9/5)^2 x (8^2) = 207. 36. Y = (28) statistical association between two variables: explanatory and response variables. Lectures page 1 (28) statistical association between two variables: explanatory and response variables. Many studies involve two or more variables measured or observed on the same subjects. We are often interested in finding out whether there is any relationship (or association or correlation) between the variables.
