एक विद्यार्थी को 30 दिन तक अपने विद्यालय जाने में निम्नलिखित समय (मिनटो में) लगते हैं: 80, 85, 78, 81, 75, 83, 70, 74, 82, 80, 77, 73, 76, 84, 79, 70, 69, 72, 77, 81, 85, 86, 70, 71, 78, 75, 74, 75, 76, 74.
प्रतिदिन विद्यालय जाने में लगने बाला औसत समय (मिनटों में) ज्ञात करें।

Find the mean of the following marks of 20 students on a screening test (out of 100). 76, 44, 45, 87, 71, 72, 82, 83, 41, 32, 75, 32, 46, 78, 17, 70, 84, 12, 77, 74

The weights of 50 custard apples are given below . ( In grams ) 35 , 40 , 45 , 40 , 50 , 55 , 60 70 , 75 , 80 , 90 , 94 , 45 , 60 , 65 , 35 , 65 , 35 , 25 , 24 , 34 , 45 , 54 , 63 , 72 , 85 , 99 , 36 , 65 , 49 , 84 , 73 , 54 , 43 , 44 , 23 , 33 , 43 , 53 , 63 , 73 , 83 , 93 , 44 , 55 , 65 , 74 , 89 , 77 , 60 Construct a grouped frequency distribution table with classes 20 – 30 , 30 – 40 , ……………………………… 90 – 100 .

The weights in grams of 50 oranges picked at random from a consignment are 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

The weekly pocket expenses (in rupees) of 30 students of a class are given below: 62, 80, 110, 75, 84, 73, 60, 62, 100, 87, 78, 94, 117, 86, 65, 68, 90, 80, 118, 72, 95, 72, 103, 96, 64, 94, 87, 85, 105, 115 Construct a frequency table with class intervals 60-70 (where 70 is not included), 70-80, 80-90. etc.

The weights in grams of 50 apples picked at random from a consignment are as follows 106, 107, 76, 82, 109, 107, 115, 93, 187, 195, 123, 125, 111, 92, 86, 70, 126, 68, 130 129, 139 119, 115, 128, 100, 186, 84, 99, 118, 204, 111, 141, 136 123, 90, 11 98, 110, 78, 90, 107, 81, 131, 75, 84, 104, 110, 80, 118, 82. Form the grouped frequency table by dividing the variable range into intervals of equal width, each corresponding to 70 gms in such a way that mid-value of the first class corresponds to 70 gms.