Frequency tables assignment

i sixsigma

i sixsigma Added an answer on May 13,2022

Correct answers:

141 $41$

23 $3$
342 $42$
450 $50$
53 $3$
651 $51$
759 $59$
86 $6$
960 $60$
1068 $68$
114 $4$
1269 $69$
1377 $77$
143 $3$
1578 $78$
161 $1$

Note that the data is not ordered and that we have been asked to use 6 classes.

To determine the class width, use the formula:

Max Value−Min ValueNumber of Classes=84−336=8.5

Since the data values are integers, round up to the next integer, 9. The minimum value, 33, is the lower class limit of the first class. To find all other lower class limits, add the class width, 9. For example, the second lower class limit would be: 33+9=42.

Lower Class Limit	Upper Class Limit	Frequency
33
42
51
60
69
78

The upper class limit for each row is one less than the lower class limit from the following row. For example, the upper class limit for the first row is 42−1=41. You can also add the class width to one upper class limit to get the upper class limit for the next row.

Lower Class Limit	Upper Class Limit	Frequency
33	41
42	50
51	59
60	68
69	77
78	86

To find the frequency for each class, count the number of data values that fall within the range of each class. For example, the data values 33, 34, and 39 fall within the range of the first class, 33-41. So, the frequency of this class is 3.

Lower Class Limit	Upper Class Limit	Frequency
33	41	3
42	50	3
51	59	6
60	68	4
69	77	3
78	86	1

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