Lies, Damn Lies and Statistics

Statistical analysis and graphical displays often reveal patterns in seemingly random data enabling predictions to be made



thumbnailCA2DHD3I.jpg
Statistics Outline
Statistics Power Point
Statistical analysis practice Questions
Statistical Analysis practice Questions Answered
Formula for standard deviation: Formula for T-test:
stdev_s.gif
t2means.gif

68% of all the data lies within 1sd of the mean
95% of all the data lies withn 2sd of the mean

P <0.05 then reject the Null hypothesis (data is significantly different)
P > 0.05 then accept the Null hypothesis (data is not significantly differnet)

Standard deviation and T-test sample

Correlation does not always establish a causal relationship:

crukmig_1000img-12578.jpg
Research2.jpg