Owens Orchards sells apples in a large bag by weight. A sample of seven bags contained the following number of apples: 23,19,26,17,21,24,22.

a)verify that s (x-sample mean)=0


This is what I'm coming up with, I'm not sure what I'm doing wrong. Help please

(23-21.7)+(19-21.7)+(26-21.7)+(17-21.7)+(21-21.7)+(24-21.7)+(22-21.7)= -1.2

I've tried rounding the 21.7 to 22, but I'm still not coming up with 0 :confused:

... might be because the mean is 21.7143

Yes, you should be using the complete mean value of 21.71428571 and you also added and subtracted wrong in your statement above. The answer to your statement is actually 0.1

I believe I see my mistake now, is this correct?

( 23-21.714285) + (19 - 21.714285) + ( 26 -21.714285) + ( 17 - 21.714285) + ( 21 - 21.714285) + (24- 21.714285) + ( 22-21.714285)=0.000005=0