Question 1
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 cumulative frequency for the interval 46-55 is _________.
Question 2
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 in the frequency distribution of grouped scores that follows.
The percentile rank of a score of 6.5 is _________.
Question 3
5 out of 5 points
Given the distribution of grouped scores shown in the following table.
What is the value of i?
Question 4
5 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 5
0 out of 5 points
Which of the following is (are) not a symmetrical distribution?
Question 6
5 out of 5 points
What indicates the number of scores that fell below the upper real limit of each interval?
Question 7
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 8
5 out of 5 points
If a large psychology class took a test on theoretical biophysics, the distribution of scores would probably be _________.
Question 9
5 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
If the numbers in the left column are deciles, the median of the distribution falls in the range of _______.
Question 10
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 highest frequency for any interval is _________.
Question 11
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 12
5 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 _______.
Question 13
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 cumulative % for the interval 46-55 is _________.
Question 14
5 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 15
5 out of 5 points
The purpose of a frequency distribution is to _________.
Question 16
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 value of i is _________.
Question 17
5 out of 5 points
Consider the following score 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 diagram is called a _________.
Question 18
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 cumulative frequency for the interval 6.0-6.3 is _________.
Question 19
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 20
5 out of 5 points
In graphing frequency distributions, _________ is usually plotted on the abscissa.
