Here are the correlatins between variables, x, y and z. rxy = .8, rxz = .9, ryz = .7. How are the correlations likely to affect eachother?
They will not be significant
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For 20 cases, if a partial correlation is calculated removing one variable, what will be the degress of freedom?
20
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In the formula for a linear regression, y' = x + bx. What is A?
the unstandardized regression weight
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The scatterplot for a correlation of -1 would form?
A diagonal line sloping upwards
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A standard score or z score is calculated by
Dividing the score by the standard deviation
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If a correlation is .2, what proportion of the variance of one variable can be predicted from the other?
40%
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If a correlation is calculated for 20 cases, what will be the degree of freedom?
18
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For multiple regression the beta weight indicates?
The correlations between the dependant and each independant variable
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In the formula for a linear regression y' = a + bx. What is b?
the unstandardized regression weight
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If a linear regression returns the following values: intercept/constant = - 3, regression weight = - 2, which will be the regression formula?
y' = -3 - 2x
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If a linear regression returns the following values: intercept/constant= 4, regression weight = 3, what is the predicted alue when the indpendant variable is 2?
10
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For the regression described in the last question, assume the following: Intercept/constant= 2, regression weight for p=3, for h=2, and for s= -2, What is the predicted value of m when the value of each of the independant variables is 1?
9
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(See class test booklet for tables) What proporton of the varance of recall variable is predicted by imagery and frequency?
. 85
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What does the adjusted r square indicate?
the predicted r square if the study is repeated
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In a principal components analysis what do the communalities measures?
the proportion of variance of each variable captured by the factors
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In principal components analysis what do eigenvalues measure?
the proportion of variance of each variable captured by the factors
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To test for an interaction between variables a and b, what term should be entered first?
a
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What statistic would you examine to see if the interaction was significant?
r square change
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What is the potential benefit of carrying out the investigation for an interaction using standard scores?
lower standard error
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(see class test tables) Look at the above output, what test has Tom conducted?
logistic regression
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Is the model significant?
yes
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There is a "(1)" after class in the final table because
it has been defined as categorical
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The relationship between this variable and the dependant measure is:
Curvelinear
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An odds ratio of .22 is equivalent (if the variables were loaded in reverse order) to an odds ratio of approximately?
2
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Other cards in this set
Card 2
Front
For 20 cases, if a partial correlation is calculated removing one variable, what will be the degress of freedom?
Back
20
Card 3
Front
In the formula for a linear regression, y' = x + bx. What is A?
Back
Card 4
Front
The scatterplot for a correlation of -1 would form?
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