15. The weight of 50 apples (in grams) from a consignment are as below:
113 131 75 82 204 81
84 118 110 104
107 80
141 111 123
90 115 90
110 98 106 99 84 107 186
76 82 109
100 115 125 107 115 93 119
187 139
129
130 68 123 195 111
125 86 92 126 70
136 78
Construct a grouped frequency distribution table for the above data, taking class width
of 20 grams if the mid-value of the first class interval is 70 grams
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as follows:
131, 113, 82, 75, 204, 81, 84, 118, 104, 110, 80, 107, 111, 141, 136, 123, 90, 78, 90, 115, 110, 98, 106, 99, 107, 84, 76, 186, 82, 100, 109, 128, 115, 107, 115, 119, 93, 187, 139, 129, 130, 68, 195, 123, 125, 111, 92, 86, 70, 126. Form the grouped frequency table by dividing the variable range into intervals of equal width of 20g, such that the mid-value of the first class interval is 70g.