Question

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.

Answer 1

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}