Use 4-point bins (96 to 99, 92 to 95, etc) to make a frequency table for the set of exam scores shown below. include columns for relative frequency and cumulative frequency.
81 82 91 90 79 83 84 93 89 82 84 98 89 94 92 81 78 77 91 93.
we have
scores
96 to 99------> frequency 1------> Relative frequency 1/20 (5%) -----> Cumulative f. 1
92 to 95------> frequency 4 ----> Relative f. 4/20 (20%) ------> Cumulative f 5
88 to 91 ------> frequency 5-----> Relative f. 5/20 (25%) ------> Cumulative f . 10
84 to 87 ------> frequency 2 ----> relative 2/10 (10%) ------> Cumilative f. 12
80 to 83 -----> frequency 5 ----> relative 5/20 (25%) ----> cumulative f. 17
76 to 79 -----> frequency 3 ----> relative 3/20 )15%) -----> cumulative f. 20
96 to 99------> frequency 1 {98}
92 to 95------> frequency 4 {93,94,92,93}
88 to 91 ------> frequency 5 {91,90,89,89,91}
84 to 87 ------> frequency 2 {84,84,}
80 to 83 -----> frequency 5 {81,82,83,81,82}
76 to 79 -----> frequency 3 {79,78.77}