More on testing

# More on testing - More on testing Click to edit Master...

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Click to edit Master subtitle style 12/1/09 More on testing

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12/1/09 Types of tests z-test One sample t-test Two sample t-test: Between subjects Within subjects
12/1/09 What’s the difference? z vs t One sample vs two sample Between subject vs within subject

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12/1/09 William Sealy Gosset Developed the “Student’s” t-test. 1876-1937 Work at Guinness Brewery Applied statistical methods to barley quality, etc. Published his work under the name “Student”
12/1/09

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12/1/09 P-value P-value – if the null hypothesis is true , what is the probability of getting a statistic as or more extreme than that observed from the data. p=.024 or p<.001 This gives more information than just whether we “reject” or “don’t reject”
12/1/09 Basic elements Mean Standard deviation Sample size

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Calculation of “between Definitional Formula: Computational Formula:
Within subjects t-test T test for related scores is defined as : where, SD = standard error of the mean for the

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## This note was uploaded on 11/30/2009 for the course HP 400m at USC.

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More on testing - More on testing Click to edit Master...

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