uestionQuestion 15 out of 5 pointsA psychologist is interested in the social interactions of preschool

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.

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