Question

the following data gives the number of residents in an area based on their age. find the average age of the resident. Age 0-8 8-16 16-24 24-32 32-40 40-48 no. of residents 2,6,9,7,4,2​

Answer 1

first draw the xi table which can be like

upper limit+ lower limit divided by 2 like

0+8÷2= 4

after that multiply xi and fi

now by direct mean method

the answer will be 22.9 which is the average age of residents