Question

Mr. Perez gave his students a biology test last week.

Here are the test scores for each of the twelve students.
Complete the grouped frequency distribution for the data.
In the distribution, the frequency of a class is the number of test scores in that class.
(Note that we are using a class width of 5.)

Answer 1

Answer: To create a grouped frequency distribution for the given data, we need to group the test scores into classes and count the frequency of each class.

The smallest test score is 62, and the largest test score is 98, so the range is 98 - 62 = 36. To create classes with a width of 5, we can start with the class containing the smallest test score, which is 60 to 64.

The complete grouped frequency distribution is:

Class Frequency

60 to 64 1

65 to 69 1

70 to 74 2

75 to 79 2

80 to 84 3

85 to 89 2

90 to 94 0

95 to 99 1

In the above table, the class represents the range of test scores, and the frequency represents the number of students who scored in that range.

Explanation: