# PSYCH 354-Calculating z scores from raw scores

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Part I: Questions 4-8Remember to show work to receive partial credit where applicable. For help working on these problems, refer to the presentation from this module/week on the normal curve and computing z-scores.4) Calculating z scores from raw scores: If a population has a mean of and a standard deviation of s = 4, calculate z scores for each of the following raw scores (X) from this population. Show work on the right hand side, put answers on the left in the space provided.Work:Work:Work:Work:5) Calculating raw scores from z scores: If a population has a mean of and a standard deviation of s = 4, calculate raw scores (X) for each of the following z scores from this population. Show work on the right hand side, put answers on the left in the space provided.Work:Work:Work:Work:6) In a normal curve, what percentage of scores falls:Work:Work:Work:Work:7) Compute the standard error (sm) for each of the following sample sizes, assuming a population mean of 110 and a standard deviation of 15.Work:Work:Work:8) Compute a z-statistic for each of the following sample means, assuming the population has a mean of 100 and a standard deviation of 30 (Remember to computesM before computing the z statistic!)Work:Work:Work:

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