Review_z_t_selected

Review_z_t_selected - 10/27/10 Probability of a raw score...

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10/27/10 1 Review: z to t Probability of a raw score What are the odds of randomly drawing one specific raw score from a normal distribution? Concerned with a distribution of raw scores z = raw score – mean of raw scores standard deviation of raw scores Knowing the location of the score within the distribution ( z ) and the knowing the shape of the distribution (normal), let’s us compute the probability. Probability of a sample mean What are the odds of randomly drawing a sample with a specific mean from a distribution of raw scores? Concerned with a distribution of sample means z = sample mean – mean of sample means standard deviation of sample means Knowing the location of the sample mean within the distribution ( z ), and the tightness (denominator) and shape of the distribution (normal), let’s us compute the probability. z Test for a Population Mean Is this one group really special or does it differ from the regular population merely because of sampling error
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Review_z_t_selected - 10/27/10 Probability of a raw score...

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