in a mock examination for the final year chemistry class, the following were obtained by 50 students. 63 70 45 59 82 61 79 37 89 33 56 539 42 64 73 59 67 72 60 46 36 61 87 91 667 54 72 39 43 57 65 45 52 35 46 64 37 595 86 76 73 67 71 74 82 61 59 58 43 71 using the class internal 31-40, 41-50, 51-60, construct frequency table indicating score, tally, frequency, class interval, class marks, and cumulative frequency
Score | Tally | Frequency | Class Interval | Class Marks | Cumulative Frequency
------ | ----- | --------- | -------------- | ----------- | -------------------
31-40 | III | 3 | 31-40 | 35.5 | 3
41-50 | IIII | 4 | 41-50 | 45.5 | 7
51-60 | IIIIIIIIII | 10 | 51-60 | 55.5 | 17
61-70 | IIII | 4 | 61-70 | 65.5 | 21
71-80 | IIIII | 5 | 71-80 | 75.5 | 26
81-90 | IIII | 4 | 81-90 | 85.5 | 30
91-100 | I | 1 | 91-100 | 95.5 | 31