Question

Posttest: Univariate Data

Select the correct answer.

Twenty students in Class A and 20 students in Class B were asked how many hours they took to prepare for an exam. The data sets represent their
answers.

Class A: (2, 5, 7, 6, 4, 3, 8, 7, 4, 5, 7, 6, 3, 5, 4, 2, 4, 6, 3, 5)

Class B: (3, 7, 6, 4, 3, 2, 4, 5, 6, 7, 2, 2, 2, 3, 4, 5, 2, 2, 5, 6}

Q: Which statement is true for the data sets?

A. The mean study time of students in Class A is less than students in Class B.

B. The mean study time of students in Class B is less than students in Class A

C. The median study time of students in Class B is greater than students in Class A.

D. The range of study time of students in Class A is less than students in Class B.

E. The mean and median study time of students in Class A and Class B is equal.

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Answer 1

mean study time of students in Class A: 4,8

mean study time of students in Class B : 4

A. The mean study time of students in Class A is less than students in Class B. : false

B. The mean study time of students in Class B is less than students in Class A : true

The median study time of students in Class B : 4

The median study time of students in Class A : 5

The median study time of students in Class B is greater than students in Class A. : false

The range of study time of students in Class A :6

The range of study time of students in Class B = 5

D. The range of study time of students in Class A is less than students in Class B :false

Explanation: