Question

Q7.When data are collected in original form, they are called raw data. The following are the scores for medical students for Biochemistry final exam 50 92 52 66 58 59 60 62 66 68 69 61 99 88 94 72 93 76 88 78 79 71 90 75 97 78 79 76 80 82 86 86 63 89 81 83 73 85 88 70 76 89 56 85 95 Organizing of raw data in table form, using classes an d f r e q u e n c i e s (Number of classes is 5)

Answer 1

Given scores are

50 92 52 66 58 59 60 62 66 68 69 61 99 88 94 72 93 76 88 78 79 71 90 75 97 78 79 76 80 82 86 86 63 89 81 83 73 85 88 70 76 89 56 85 95

Total number of scores are 44

Given number of classes is 5

The lowest value is 50 and highest value is 99

The class limits will be as follows

50-59 , 60-69 , 70-79 , 80-89 , 90-99 The class width is 10 here which should be equal in all the classes

Now we will sort the numbers in ascending order, so it will be easy to calculate the frequeny of each class

The scores after sorting in asceding order is as follows

50 52 56 58 59 60 61 62 63 66 66 68 69 70 71 72 73 75 76 76 76 78 78 79 79 80 81 82 83 85 85 86 88 88 88 89 89 90 92 93 94 95 97 99

Class	Frequency
50-59	5
60-69	8
70-79	12
80-89	12
90-99	7
	Sum of frequencies = 44