Find the arithmetic mean of the following frequency distribution :{:(Class interval: ,0-20,20-40,40-60,60-80,80-10...

Calculate the arithmetic mean of the following frequency distribution by Direct Method: {:("Class Interval",10-20,20-40,40-70,70-120,120-200),("Frequency"," "4," "10," "26," "8," "2):}

Calculate arithmetic mean of the following frequency distribution: {:("Class","less than 10",10-20,20-30,30-40,40-50,50-60,"more than 60"),("Frequency"," "5," "12," "18," "22," "6," "4," "3):}

Determine the modal class for the frequency distribution given below is: {:("Class interval",0-20,20-40,40-60,60-80,80-100),("Number of workers",15,18,21,29,17):}

Find the mean of the following frequency distribution: Classes: 0-20 20-40 40-60 60-80 80-100 Frequency: 15 18 21 29 17

The median class in the following frequency distribution is {:("Class interval :",0-10,10-20,20-30,30-40,40-50),("Frequency :",12,13,25,20,10):}

Find the mean of the following frequency distributions: Class interval: 0-10 10-20 20-30 30-40 40-50 Frequency: 9 12 15 10 14

Find the mean of the following frequency distribution: Class-interval: 0-10 10-20 20-30 30-40 40-50 No. of workers f: 7 10 15 8 10