Question 1
0 out of 5 points
Given the distribution of grouped scores shown in the following table.
How many occurrences fall below the upper real limit of the interval 70-79?
Question 2
5 out of 5 points
In a frequency polygon the points are plotted over _______ at a height corresponding to the frequency of the interval.
Question 3
5 out of 5 points
The true limits of 7.0 are _________.
Question 4
0 out of 5 points
A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown below arranged in a frequency distribution of grouped scores.
The cumulative percentage for the interval 5.2-5.5 is _________.
Question 5
5 out of 5 points
Given the distribution of grouped scores shown in the following table. N equals _______.
Question 6
0 out of 5 points
A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown in the frequency distribution of grouped scores that follows.
The relative frequency for the interval 5.2-6.6 is _________.
Question 7
5 out of 5 points
If the range of a distribution were 89 and the data were reported as whole numbers, what would the width of the class interval be if one chose to group the distribution into approximately 14 class intervals?
Question 8
5 out of 5 points
A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data.
The 50th percentile point is _________.
Question 9
5 out of 5 points
A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown below arranged in a frequency distribution of grouped scores.
The real limits of the interval 6.4-6.7 are _________.
Question 10
0 out of 5 points
The purpose of a frequency distribution is to _________.
Question 11
0 out of 5 points
A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data.
The cumulative frequency for the interval 46-55 is _________.
Question 12
0 out of 5 points
Assume your task is to group the raw scores given below into a frequency distribution of approximately 12 intervals of equal width.
The interval containing the most scores is _________.
Question 13
5 out of 5 points
When constructing bar graphs, the bars do not touch each other because _______.
Question 14
5 out of 5 points
A distribution which has a predominance of scores at the lower values of the distribution and which tails off at the higher end is _______.
Question 15
0 out of 5 points
The range of a set of scores with a maximum value of 92 and a minimum value of 26 is _________.
Question 16
5 out of 5 points
Given the distribution of grouped scores shown in the following table. The cumulative frequency of 115 indicates that 115 scores fall below _______.
Question 17
5 out of 5 points
If a curve is symmetrical, _________.
Question 18
0 out of 5 points
When individual scores are combined into groups, _________.
Question 19
5 out of 5 points
What indicates the proportion of the total number of scores that occurred in each interval?
Question 20
0 out of 5 points
Consider the following stem-and-leaf diagram.
1
2
2
1 3
3
2 4 6 7
4
2 3 5 6 8
5
1 3 4 4 5 6 8
6
3 3 3 5 6 7 8 8 9 9 9
7
2 2 2 3 3 4 5 5 5 6 6 7 7 7
8
1 1 1 2 3 3 4 4 5 5 5 6 6 6 6
9
2 2 2 3 3 4 4 5 5 5 6 6 7
This score distribution is _______.
