Monash University **We aren't endorsed by this school
Jun 3, 2023
Uploaded by SuperHumanWillpower11762 on coursehero.com
Page1of 1
Unformatted Text Preview
Research Methods (BIOL1070) Data Treatment Part A : Workshop The aim of this workshop is to give you some experience using standard statistical treatments of data using statistical software. The package we will use for this workshop is Minitab. It is the package used as the standard statistical software by the Mathematics and Statistics courses at RMIT and Chemistry also has a site licence for it Most of the analyses in this workshop can be done using Excel but Excel is not very user- friendly for statistical analyses. The analyses in Minitab can be done from simple pull-dovm menus and there is a good on-line help facility. You can copy-and-paste data from Excel into Minitab. For the assessment you should enter your results into the attached pro forma. Case Study 1 Analyst A Analyst B 4.42 4.40 4.41 4.53 4.43 4.52 4.38 4.58 The above results were obtained by two analysts using a new method for determination of Nickel in a standard reference alloy containing a certified value of 4.49% Ni For this data we want to determine the standard statistics:- (i) mean (ii) variance (iii) standard deviation and (iv) confidence intervals for the mean. This data enables us to answer the following questions:- (a) Which analysis is the most accurate? (i.e. closest to the certified value) (b) Which analysis is the most precise? (i.e. which has the smallest spread, or variability, of values As well we can use the t-test to answer the following:« (c) Is there any evidence, with either analyst, of a systematic error? I.e. does either average differ significantly from the certified value? (d) Do the results of each analyst differ significantly?
Uploaded by SuperHumanWillpower11762 on coursehero.com