stats exam 2

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16 Terms

1
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type 1 error

rejecting the null hypothesis (Ho) when it is true

2
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internal validity

assesses the degree of confidence that a causal relationship being tested is trustworthy and not influenced by other factors or variables

3
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sum of squares (ss)

sum of squared deviations from the mean

4
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face validity

form of validity that is demonstrated when a measure superficially appears to measure what it claims to measure

5
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type 2 error

failing to reject the null hypothesis (Ho) when it is false

6
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external validity

assess the degree to which findings of a study can be generalized to other populations or settings

7
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s

average deviation from the mean

8
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construct validity

form of validity that is demonstrated when scores obtained from a measure are directly related to the variable itself

9
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power

probability of correctly rejecting the null hypothesis when it is false

10
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random error

cases which have an unpredictable influence on our measurements

11
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s hat

best estimate of the population standard deviation

12
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convergent validity

form of validity that is demonstrated when scores obtained from a new measure are directly related to scores obtained from a more established measure of the same variable

13
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independent groups t-test

  • iv is between subjects

  • iv has 2 levels

  • dv has to be quantitative

14
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correlated groups t-test

  • iv is within subjects

  • iv has 2 levels

  • dv is quantitative

15
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one-sample z-test

  • know sigma

  • quantitative variable

  • interval, ratio (Xbar→M)

16
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one sample t-test

  • quantitative variable

  • Xbar→M