Question

A student spends the following time (in minutes) on journey on 30 days for attending
his school :
83, 73, 72, 71, 74, 76, 70, 69, 77, 75, 80, 70, 76, 77, 78,
75, 85, 74, 81, 84, 78, 81, 82, 80, 70, 86, 79, 85, 74, 75,​

Answer 1

Mean = 77 , Median = 76.5  & 3 Modes 70 , 74 & 75

Step-by-step explanation:

Arranging data in ascending order

69  70  70  70 71   72   73  74  74  74 75  75 75  76  76  77 77  78 78  79 80  80 81  81   82  83    84   85  85   86

total 30 days median = (15th + 16th)/2  = (76 + 77)/2 = 76.5 days

Mode = 70  ,  74  ,  75  ( 70 , 74 & 75 comes 3 times each)

Three modes

Mean =  2310/30 = 77

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Answer 2

The average time spent on journey per day is 77 minutes.

Step-by-step explanation:

The directions in this question is missing. The missing part is "Find the average time spent (in minutes) on journey per day"

The given data is

83, 73, 72, 71, 74, 76, 70, 69, 77, 75, 80, 70, 76, 77, 78,

75, 85, 74, 81, 84, 78, 81, 82, 80, 70, 86, 79, 85, 74, 75

Formula for Average is given by

$\text{Average}=\frac{\text{ Sum of data } }{\text{ Total number of data }}$

Here, number of data is 30.

And sum of these data is

83+73+ 72+ 71 + 74+ 76+70+69+77+ 75+80+70+76+77+

78+75+85+74+81+84+78+81+82+ 80+70+ 86+79+85+74+ 75

= 2310

Therefore,  the average time spent (in minutes) on journey per day is given by

$\text{Average}=\frac{2310}{30}\\\\\text{Average}=77\text{ minutes}$

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