The number of students absent in a class were recorded every day for 120 days and the information is given in the following frequency table: No. of students absent `(x)` : 0 1 2 3 4 5 6 7 No. of days `(f)` : 1 4 10 50 34 15 4 2 Find the mean number of students absent per day.

The number of students absent in a class were recorded every day for 120 days and the information is given in the following frequency table. Then mean number of students absent per day is {:("No. of student absent",0,1,2,3,4,5,6,7),("No. of days ",1,4,10,50,34,15,4,2):}

The number of students absent in a school was recorded every day for 147 days and the raw data was presented in the form of the following frequency table. No. of Student absent: 5 6 7 8 9 10 11 12 13 15 18 20 No. of days 1 5 11 14 16 13 10 70 4 1 1 1 Obtain the median and describe what information it conveys.

The number of telephone calls received at an exchange per interval for 250 successive one-minute intervals are given in the following frequency table: No. of calls (x) : 9 1 2 3 4 5 6 No. of intervals (f) : 15 24 29 46 54 43 39 Compute the mean number of calls per interval.

The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below: Marks (x) : 15 20 22 24 25 30 33 38 45 Frequency (f) : 5 8 11 20 23 18 13 3 1 Find the average number of marks.

Following table shows the weight of 12 students: Weight (in kgs) 67 70 72 73 75 Number of Students: 4 3 2 2 1 Find the mean weight of the students.

Draw an ogive to represent the following frequency distribution: Class-interval: 0-4 5-9 10-14 15-19 20-24 No. of students: 2 6 10 5 3

The total number of observations in the following distribution table is 120 and their mean is 50. Find the value of missing frequencies f_(1) and f_(2) :

Following table shows the weights of 12 students: Weight (in kgs): 67 70 72 73 75 No. of Students: 4 3 2 2 1 Find the mean weight.

Following table shows the weights of 12 students: Weight (in kgs): 67 70 72 73 75 No. of Students: 4 3 2 2 1 Find the mean weight.

Find the mean of the following frequency distribution: Variable (x_i) , 2, 4, 6, 8, 10, 12, 14, 16 Frequency (f_i) , 4, 4, 5, 15, 8, 5, 4, 5