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A quiz on central tendency, variability, and correlation concepts, likely used in an educational setting such as a university course. The quiz covers topics like skewness, measures of central tendency (mean, median, mode), standard deviation, z-scores, and correlation. The questions test the student's understanding of these statistical concepts and their ability to interpret and apply them. The quiz questions, answers, and the student's score, indicating it is a graded assessment. This quiz could be useful for students studying statistics, research methods, or related fields to practice and reinforce their knowledge of these fundamental statistical principles.
Typology: Exams
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6 at 10:51pm
This attempt took 10 minutes.
Inncoorrrecctt
The distribution below is :
negatively skewed.
normal.
positively skewed.
rectangular.
With which term is the mean synonymous?
Average
Frequency
Interval
Midpoint
In a frequency distribution of 290 scores, the mean is 99 and the median is 86. Onewould
expect this distribution to be:
negatively skewed.
normal.
positively skewed.
symmetrical.
d
Which of the following fall(s) at a z-score of 0.0 in a normal distribution?
Mean
Median
Mode
o
n
nc o
o r
rre c
c t
t
A research worker gave a scholastic aptitude test to a sample of eighth graders. Then he
correlated the aptitude test scores with the chronological ages of the subjects. He found a
correlation of - .42. How should this result be interpreted?
He obviously made a computational error.
His sample was composed of pupils with low academic potential.
The older members of the grade tended usually to be pupils with low academic potential and vice-
versa.
The relationship between age and intelligence decreases as people reach the age of 14.
n
nc o
o r
rre c
c t
t
The coefficient of determination is used to:
compute correlations for truncated ranges.
compare the relative strength of coefficients.
identify curvilinear relationships.
test correlations for causality.
When a relationship between two variables is curvilinear, a linear correlation coefficient
computed for each data will be:
a determination coefficient.
spuriously high.
spuriously low.
truncated.
