Question

11. A relative frequency value of 0.074 is equal to what percentage?

12. What is incorrect in the grouped frequency classes below?

Class Interval

100 - 105

105 - 110

110 - 115

115 - 120

A. There are no problems

B. The classes are not mutually exclusive

C. The class width is inconsistent

D. The classes are not continuous

12. The possible grades on a statistics class project are A, B, C, D, and F. In one section, the frequency of Cs in the class is 10. Which of the following statements are true?

	A.	There are 10 students in the class and all earned a C.
	B.	10% of students earned a grade of C.
	C.	10 students in the class earned a C.
	D.	The proportion of the students who earned a C is 0.10

14. The midpoint for the class 83 - 87 is _____.

15. What is incorrect in the grouped frequency classes below?

Class Interval

27 - 32

33 - 38

40 - 45

46 - 51

52 - 57

	A.	The classes are not mutually exclusive
	B.	The classes are not continuous.
	C.	There are no problems
	D.	The class width is inconsistent.

16. The class width for the class intervals below is ________.

83 - 87

88 - 92

93 - 97

Answer 1

11. A relative frequency value of 0.074 is equal to what percentage?

Answer : percentages of relative frequency = 0.074*100% = 7.4%

12. What is incorrect in the grouped frequency classes below?

Class Interval

100 - 105

105 - 110

110 - 115

115 - 120

The classes must be exhaustive. This means that there must be a class for every data value in the data set so that every data value is included in the frequency distribution.

B. The classes are not mutually exclusive

12. The possible grades on a statistics class project are A, B, C, D, and F. In one section, the frequency of Cs in the class is 10. Which of the following statements are true?

Here frequency is 10 for Cs grade mins 10 students earned grade C in sclass project.

C.	10 students in the class earned a C.

14. The midpoint for the class 83 - 87 is _____.

midpoint = ( 87 + 83 ) / 2 = 85

15. What is incorrect in the grouped frequency classes below?

Class Interval

27 - 32

33 - 38

40 - 45

46 - 51

52 - 57

The classes are not contineous because 39 is not included in 33-38 or 40-45.

B.	The classes are not continuous.

16. The class width for the class intervals below is ________.

Class width = upper limit - lower limit = 87 - 83 = 4