% IAP 2007 Introduction to MATLAB: Statistics and Data Analysis
% Instructor: Violeta Ivanova, violeta@mit.edu

% EXERCISE 1 MATLAB Statistics Toolbox
% Correlation Coefficient, Hypothesis Testing, ANOVA, Statistical Plots
% Original data for RFID and barcode scanning experiments are in the file
% sampledata.xls, courtesy of Teresa Pontillo, MIT Aeronautics & Astronautics.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% A. DATA IMPORT

% A1. Import RFID experiment data from file RFID.dat to matrix rfid.
% Column 1: No. antennae; Column 2: No. items; Column 3: Type of item;
% Column 4: No. tags; Column 5: Time (sec); Column 6: Accuracy (%)


% A2. Import barcode scanning data from file barcode.dat to matrix bc. 
% barcode = load('barcode.dat');


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% B. CORRELATION COEFFICIENT

% B1. Compute correlation coefficients for the RFID independent variables 
% (columns 1-4 in rfid) with the test results (columns 5-6 in rfid)
% Which correlations are significant within 95% confidence interval?







% B2. Compute correlations for the time to scan one item with RFID.








%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% C. ANALYSIS OF VARIANCE

% C1. Perfom ANOVA to determine if the time per item is correlated to
% the number of items in each scan, and annotate the created box plot. 






% A7. Perfom ANOVA to determine if the accuracy is correlated to the
% number of items in each scan, and if accuracy meets a required 95%.
% Annotate the created plot. 







%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% D. COMPARISION OF TWO PROCEDURES

% D1. Compute correlations for the time to scan one item with barcode scan.








% D2. Perfom ANOVA to determine if the time per item is correlated to
% the number of items in each barcode scan, and annotate the created box plot. 






% D3. Compare graphically the RFID and barcode efficiency (time to scan one item)
% Hint: Use the two box plots (from A6 and A9) and the Property Editor.