- #1

nerdy_hottie

- 19

- 0

## Homework Statement

So I'm doing a Least Squares Analysis and I'm wondering about what the 'measured mean value of y for replicate measurements of the unknown' value is supposed to be. I have no idea in the world what it's asking for. The value it is speaking of is not the same as the average value in y. I will post the example so you can see what I'm talking about.

Least-Squares Spreadsheet

X Y

1 2

3 3

4 4

6 5 m 0.615384615 1.346153846 b

sm 0.054392829 0.214144783 sb

R2 0.984615385 0.196116135 sy

n= 4

Mean y= 3.5

Σ(xi-mean x)2 13

*********Measured y= 2.72

k= number of replicate measurements of y= 1

Derived x= 2.2325

sx= 0.373502805

## Homework Equations

I'm looking for an equation, or an explanation as to how to obtain the value.

## The Attempt at a Solution

I have asterisks (********) next to the measured y value in the spreadsheet. (The value is 2.72). The only reason I know what it is in this case is because this is an example from my textbook. I have no idea where it comes from, but I need it for an equation to be able to do my lab and I don't know how to find the value.

As far as I can make sense of it, I have no means of calculating 'measured mean value of y for replicate measurements of the unknown', as there are no replicate measurements of the y values. Right?

Just in case it helps, this is for an analytical chemistry lab, but it's pertaining to statistics, so I asked it here.

Thanks.