Test Bank – Statistics: A Tool for Social
Research and Data Analysis, 12th Edition by
Healey & Donoghue
Which of the following can be expected to be positively correlated? - answer-(C) Both of
the above
Scores on a final exam and the average of all other tests in that course
Scores on a midterm exam and a final exam in the same course
Which of the following are likely to be negatively correlated? - answer-(A) Number of
errors made on a math test and a measure of that student's math aptitude
If two variables are highly positively correlated, which of the following must have
approximately the same numerical value and the same sign? - answer-(B) The paired z
scores
Which of the following indicates the strongest relationship between two variables? -
answer-(A) -.54
If we compute the correlation between scores on an intelligence test and grades in
school, the correlation will be closest to zero for which of the following samples? -
answer-(B) Gifted children with IQs of at least 130
It is more difficult to obtain a highly positive or a highly negative correlation between two
variables when: - answer-(A) the variability on both variables is extremely low
A researcher finds that a correlation of .32 is not statistically significant using the .05
criterion. The researcher should conclude that the population correlation coefficient is: -
answer-(D) none of the above
Above: equal to zero, likely to be small (but positive), equal to .32
A researcher finds that a correlation of -.51 is statistically significant using the .05
criterion. The researcher should conclude that the population correlation coefficient is -
answer-(C) less than zero
Using a sample of 10,000 cases, a researcher obtains a Pearson r of .11 that is
statistically significant .05 criterion. The researcher should conclude that: - answer-(A)
the population correlation coefficient is not zero
When using the Pearson r as an inferential statistic, the degrees of freedom are equal to
- answer-(D) the number of pairs minus two
Research and Data Analysis, 12th Edition by
Healey & Donoghue
Which of the following can be expected to be positively correlated? - answer-(C) Both of
the above
Scores on a final exam and the average of all other tests in that course
Scores on a midterm exam and a final exam in the same course
Which of the following are likely to be negatively correlated? - answer-(A) Number of
errors made on a math test and a measure of that student's math aptitude
If two variables are highly positively correlated, which of the following must have
approximately the same numerical value and the same sign? - answer-(B) The paired z
scores
Which of the following indicates the strongest relationship between two variables? -
answer-(A) -.54
If we compute the correlation between scores on an intelligence test and grades in
school, the correlation will be closest to zero for which of the following samples? -
answer-(B) Gifted children with IQs of at least 130
It is more difficult to obtain a highly positive or a highly negative correlation between two
variables when: - answer-(A) the variability on both variables is extremely low
A researcher finds that a correlation of .32 is not statistically significant using the .05
criterion. The researcher should conclude that the population correlation coefficient is: -
answer-(D) none of the above
Above: equal to zero, likely to be small (but positive), equal to .32
A researcher finds that a correlation of -.51 is statistically significant using the .05
criterion. The researcher should conclude that the population correlation coefficient is -
answer-(C) less than zero
Using a sample of 10,000 cases, a researcher obtains a Pearson r of .11 that is
statistically significant .05 criterion. The researcher should conclude that: - answer-(A)
the population correlation coefficient is not zero
When using the Pearson r as an inferential statistic, the degrees of freedom are equal to
- answer-(D) the number of pairs minus two
