[hline" enrs ",10-20,20-30,30-40,40-50,50-60],[hline" (000) ",30,32,15,12,9],[hline]

Average age of the people of a counry is shown in the following table: {:("Age (Years)",10-20,20-30,30-40,40-50,50-60),("People ('000)"," "30," "32," "15," "12," "9):} Find out mean age by Direct Method.

For the following frequency distribution draw a cumulative frequency curve of "'more than type'" and hence obtain the median value [["Class",0-10,10-20,20-30,30-40,40-50,50-60,60-70],["Frequency",5,15,20,23,17,11,9]]

Find the mean for the following data. {:("Marks obtained",10-20,20-30,30-40,40-50,50-60,60-70),("Number of students",8,6,12,5,2,7):}

For the given distribution, draw the less than and greater than cumulative frequency curves. {:("Class Interval",0-10,10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Frequency",5,3,7,2,14,9,15,10):}

Draw a frequency curve for the data given below: {:("Class Interval",0-10,10-20,20-30,30-40,40-50,50-60,60-70),("Frequency",3,2,4,6,9,7,10):}

Estimate the mode of the following data from the histogram. {:("Class Interval",0-10,10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Frequency",8,10,15,16,20,13,14,12):}

Construct a histogram for the frequency distribution below: {:("Class Interval",10-20,20-30,30-40,40-50,50-60),("Frequency",6,3,8,4,7):}

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):}