chapter 4: the normal curve

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4 Terms

1
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normal curve

a bell-shaped theoretical distribution of scores that is unimodal and symmetrical; the standard normal curve always has a mean of zero and a standard deviation of one

2
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z scores

standard scores; the way scores are expressed after they have been standardized to the theoretical normal curve; always have same values for their mean (0) and standard deviation (1)

3
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standard normal curve table

a detailed description of the area between a z score and mean of any standardized normal distribution

4
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probability

the ratio of the number of successes to the number of possible events