The weights of a sample of 100 boxes being shipped by Air France from New York t
ID: 3133355 • Letter: T
Question
The weights of a sample of 100 boxes being shipped by Air France from New York to Paris are:
Weights (pounds) Number
50-74 4
75-99 16
100-124 21
125-149 46
150-174 13
What is the arithmetic mean?
Explanation / Answer
Here, we are given,
Weights
f
Middle value X
fx
50 -74
4
62
248
75-99
16
87
1392
100-124
21
112
2352
125-149
46
137
6302
150-174
13
162
2106
Total
100
560
12400
Arithmetic mean = fx/ f = 12400 / 100 = 124
Arithmetic mean = 124
Weights
f
Middle value X
fx
50 -74
4
62
248
75-99
16
87
1392
100-124
21
112
2352
125-149
46
137
6302
150-174
13
162
2106
Total
100
560
12400
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