Posted by **Ashley** on Friday, March 26, 2010 at 7:05pm.

I get how to use the method of least squares to determine slope, intercept, uncertainties in slope and intercept of your graph and but am confused how to determine the error of mole percent stated in (ii)

The following are peak areas for chromatograms of isooctane standards

Peak area Mole percent isotane

0.352 1.09

0.803 1.78

1.08 2.60

1.38 3.03

1.75 4.01

(i)Use the method of least squares to find the slope, intercept, uncertainties in slope and intercept of your graph and give the equation of the line.

(ii) A peak area of 2.65 was obtained for an unknown sample of hydrocarbon mixture. Calculate the mole percent of isooctane in the mixture, error of the mole percent and the 95% confidence interval of the mole percent if the peak area was

(a) the result of a single measurement and

(b) the mean of four measurements

(c) comment on the difference in answers to (a) and (b)

Hope anyone can help me with this homework

## Answer This Question

## Related Questions

- Math - For the equation y = -6x, what is the slope and y intercept? The formula...
- Math - For the equation y = -6x, what is the slope and y intercept? The formula...
- Slopes - Given y = 2x – 4, choose the statement that accurately describes this ...
- My Daughter Stacy needs help in math plz help! - You have to find the x and y ...
- algebra - Which of the following is not a step used when graphing the equation y...
- Algebra 2 - Can someone help me with this equation please? The directions are: ...
- Is this right? - I have to determine the slope and y- intercept of this ...
- Pre-Calculus Questions - Hi! Can someone help me with these? Thanks! 1.) ...
- College algebra! - For the linear function f(x) = 5x + 3 (a) Determine the slope...
- Pre-Calculus - help please Identify the slope and intercept of the following ...

More Related Questions