Pairs of scores from a correlational study are typically plotted on a:
histogram
scatterplot
line graph
pie chart
A set of mutually exclusive categories or classes, together with a count of the number of data values falling into each category, is termed a:
sorted list
histogram
frequency distribution
scatterplot
A ________ presents a frequency distribution graphically as a series of bars representing the classes whose heights indicate the number of cases falling into each class.
histogram
scatterplot
line graph
stemplot
A distribution contains the following scores: 1, 2, 2, 3, 2, 5, 4, 1, 4, 3. The mode of this distribution is:
2.5
2.7
2
4
In a distribution with an even number of scores, the median is determined by:
finding the most frequent score in the top half of the distribution and the bottom half and then averaging them
finding the arithmetic average of the entire distribution and dividing it in half
averaging the middle pair of scores
finding the most frequent score
The measure of central tendency that takes the most information into account is the:
median
mode
mean
standard deviation
For data measured on a nominal scale, you would use the ________ as your measure of central tendency.
mean
mode
median
all of the above
The least information measure of variability is the:
variance
standard deviation
range
mean
The most popular measure of variability is the:
standard deviation
variance
range
mean
The presence of outliers affects the ________ of the Pearson r.
sign
magnitude
both a and b
none of the above
In which of the following cases would you not use the Pearson r?
the range of scores in one distribution is restricted
one of the distributions is skewed
the relationship between the variables is nonlinear
in all the cases listed above
The measure of correlation to use when one variable is measured on a dichotomous nominal scale and the other on an interval scale is the:
Point-biserial
Phi coefficient
Spearman rho
Pearson r
If you wanted to correlate the ranking of the Presidential candidates made by the news networks and the ranking of the Presidential candidates made by senators, then you would use the:
Point-biserial
Phi coefficient
Spearman rho
Pearson r
If you wanted to correlate the final exam grades (e.g., A, B, C, D) at Valdosta State University with the number of parking tickets issued to Valdosta State University students during finals week, then you would use a:
Point-biserial
Phi coefficient
Spearman rho
Pearson r
When graphing ________ data, you should use a line graph. When graphing ________ data, you should use a bar graph.