An electronics manufacturer test every 10 th cell

6)
7) An electronics manufacturer test every 10
th
cell phone to verify that it is functioning
properly. Identify the kind of sample that is being used.
A) systematic sample B) simple random sample
C) cluster sample D) stratified sample
7)
1

8) The following frequency distribution presents the weights in pounds (lb) of a sample of
visitors to a health clinic.
Weight (lb) Frequency
90-99 1
100-109 4
110-119 4
120-129 3
130-139 7
140-149 6
150-159 4
160-169 2
What is the class width?
8)
9) What are the boundaries of the class 11-18? 9)
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the
question.
10) Find the class boundaries, midpoint, and width of the class 28-34? 10)
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the
question.
11) State the reason why the following frequency distribution is incorrectly constructed.
Class Frequency
45-50 3
50-55 0
55-60 6
60-65 5
65-70 3
11)
12) State the reason why the following frequency distribution is incorrectly constructed.
Class Frequency
124-129 1
130-135 7
142-147 11
148-153 14
A) a class has been omitted B) class limits overlap
C) class width is not uniform D) there is no percent column
12)
2

13) A recent statistics exam yielded the following 25 scores. Construct a grouped
frequency distribution with the class limits shown below.
63 86 77 51 67
55 89 63 68 96
81 82 44 80 90
77 87 74 91 59
77 79 45 87 97
Class Limits Tally Frequency
41-50
51-60
61-70
71-80
81-90
91-100
A)
Class Limits Frequency
41-50 3
51-60 2
61-70 4
71-80 7
81-90 6
91-100 3
B)
Class Limits Frequency
41-50 2
51-60 3
61-70 4
71-80 6
81-90 7
91-100 3
C)
Class Limits Frequency
41-50 2
51-60 3
61-70 5
71-80 5
81-90 6
91-100 4
D)
Class Limits Frequency
41-50 2
51-60 2
61-70 5
71-80 6
81-90 7
91-100 3
13)