Given the distribution of grouped scores -1

Question 1

5 out of 5 points

Given the distribution of grouped scores shown in the following table.

How many occurrences are there for the interval 60-69?

Question 2

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 3

5 out of 5 points

Given the distribution of grouped scores shown in the following table. The percentile rank of a score of 41 equals _________.

Question 4

5 out of 5 points

What indicates the proportion of the total number of scores that occurred in each interval?

Question 5

5 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 lowest class interval is _________.

Question 6

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. The resulting data are shown in the following frequency distribution.

The relative frequency for the interval 76-85 is _________.

Question 7

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 8

0 out of 5 points

The percentile rank of a score is defined as _________.

Question 9

5 out of 5 points

The true limits of 7.0 are _________.

Question 10

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 11

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 real limits of the interval 56-65 are _________.

Question 12

5 out of 5 points

When individual scores are combined into groups, _________.

Question 13

5 out of 5 points

A curve is negatively skewed when _________.

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

In graphing frequency distributions, _________ is usually plotted on the abscissa.

Question 16

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 relative frequency for the interval 5.2-6.6 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

When constructing bar graphs, the bars do not touch each other because _______.

Question 19

5 out of 5 points

If a curve is symmetrical, _________.

Question 20

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 _________.