00:01
The question says, compared the variability of expenditure of families in two town as given below.
00:08
So here it's given town a and town b.
00:16
So first of all, i have to graph the given data which is given in question, that means to calculate the frequency, f of x, f of x minus x1 bar whole square.
00:27
So for town a will be, this is the given data expenditure.
00:32
3 ,000 to 400, 4 ,100 to 500, it will go till 8 ,100 to 900.
00:39
This is the frequency 4, 65, 138, and this x is here midpoint, 3 ,500, 4 ,550, and f of x by multiplying, and f of x minus x1 whole square is this, and the summation of fx is 2 to 2 ,2 ,86 ,000, and summation of x minus x bar will be 9049 .994.
01:06
Now coming to type b, this is the graph given data for type b or you can say town b...