Unformatted text preview: MATH 2300 - Formula sheet
\/ The mean is the sum of the observations divided by the number of observations _ x . .
Mean = x = Z— ; n IS the sample Size.
n > Sample Stande deviation = .S' = observation — mean
> Z-SCOI'C = Z = —'f_
standard dev1at10n > Interquartile Range = IQR = Q3 - Q1, ; Q3 is the 3"1 quartile and Q] is the 1" Quartile. \ > Linear Correlation= r = —1—Z(x—x)(y—y)
rg—l s1 5 .V
> Regression Formulas for y-Intercept and Slope Regression Line: )A/ = a + bx Slope = b = 7(1):) Y- Intercept = a = )7 -- b0?)
SI fl Residual = y — y ...
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- Spring '08