2. In experiment 1, we discussed how one could compute concentrations of an element via XRF viatwo different methods. The first involved "recalibrating" analyzer response (plotting analyzerreported ppm Pb vs true ppm Pb). The second used first principles (plotting Pb LB intensity /Compton peak intensity vs true ppm Pb).The table below shows results from determination of Pb in five different SRMs via these twomethods. Determine whether or not these two methods give results that are statistically equivalent atthe 50% confidence level. Repeat this calculation at the 95% confidence level. Be sure to show yourwork (i.e., computed mean, standard deviation, etc.) and how you arrived at your conclusion.Sample # Method 1ppm Pb1213452115243411861612Method 2ppm Pb3415742510761518

Sample Method 1 Method 2 1 21 34 2 152 157 3 434 425 4 1186 1076 5 1612 1518

Answered: 2. In experiment 1, we discussed how…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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4. The amount of contaminants in two independent samples (comprised of independent subjects) from two distinct bird species is measured in a veterinary hospital. The summary of the data is presented below. Data from Pop. 1 Data from Pop. 2 n1=13 71=1.12 $1=0.52 72=D15 I2=1.49 S2=0.70 We are interesting in testing Ho: -P2=0, versus H,: A-A20. And we will mnake the normality assumption. (a) Suppose that we know the population variances: of = 0.1, o = 0.2. Design the test and find its pvalue. What conclusion do you reach at significance level 5%? (b) Suppose that the researchers do not trust these population vari- ance values, and would like to do the test based on the sample variances provided above. Assuming equal variance, how would your conclusions changed? %3D
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