z-scores for Non-Normal Distributions Flashcards

1
Q

Non-normal distributions can be transformed into sets of

A

unit-free, standardized z scores

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2
Q

Non-normal distributions can be transformed into sets of unit-free, standardized z scores
In these cases, the standard normal table cannot be used

A

The distribution of the z scores will match the non-normal distribution
In other words, if the non-normal distribution is positively skewed, then the z-score distribution will also be skewed

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3
Q

Regardless of the shape of the distribution, what happens during the

A

the shift to z scores always produces a distribution of standard scores with a mean of 0 and a standard deviation of 1

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4
Q

Under most circumstances, z scores provide efficient descriptions of

A

relative performance on one or more tests.

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5
Q

The use of z scores can help you identify a person’s relative

A

strengths and weaknesses on several different tests

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6
Q

z scores reflect performance relative to some group rather than

A

an absolute standard

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7
Q

Any unit-free scores expressed relative to a known mean and a known standard deviation

A

standard scores

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8
Q

Transformed standard score

A

A standard score, that unlike a z score, usually likes negative signs and decimal points
Used when reporting test results to a wide audience

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9
Q

z’ = desired mean + (z) (desired standard deviation)

z’ (called z prime) is the transformed standard score and z is the original standard score

A

Use the following formula to convert any original standard score, z, have a distribution with any desired mean and standard deviation

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