2. A random sample of subjects who tested positive for influenza during the 2014-15 flu season was obtained. The dataset is given in the Flu tab. There are four different influenza type: A/H1N1, A/H3N3, A-unsub, and B. There are five age groups. Each subject was classified by age group and influenza type. Determine whether there is evidence at the 5% significance level that age group and influenza type are associated. Fully justify! Include hypotheses, test used, needed assumptions, test statistic, p-value, decision and conclusion. HINT: you should put the frequencies into a matrix. Include the Observed and Expected Matrices in the report file.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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Here's the data:

Age Group Influenza type Count
Younger than 5 A/H1N1 150
Younger than 5 A/H3N2 999
Younger than 5 A unsub 1628
Younger than 5 B 495
5 - 19 A/H1N1 96
5 - 19 A/H3N2 748
5 - 19 A unsub 1163
5 - 19 B 495
20 - 44 A/H1N1 319
20 - 44 A/H3N2 1207
20 - 44 A unsub 1617
20 - 44 B 512
45 - 64 A/H1N1 200
45 - 64 A/H3N2 1206
45 - 64 A unsub 1946
45 - 64 B 476
65+ A/H1N1 220
65+ A/H3N2 3299
65+ A unsub 5316
65+ B 997
2. A random sample of subjects who tested positive for influenza during the 2014-15 flu season was obtained. The dataset is given in the Flu tab. There are four different influenza types: A/H1N1, A/H3N3, A-unsub, and B. There are five age groups. Each subject was classified by age group and influenza type. Determine whether there is evidence at the 5% significance level that age group and influenza type are associated. Fully justify! Include hypotheses, test used, needed assumptions, test statistic, p-value, decision, and conclusion. HINT: you should put the frequencies into a matrix. Include the Observed and Expected Matrices in the report file.
Transcribed Image Text:2. A random sample of subjects who tested positive for influenza during the 2014-15 flu season was obtained. The dataset is given in the Flu tab. There are four different influenza types: A/H1N1, A/H3N3, A-unsub, and B. There are five age groups. Each subject was classified by age group and influenza type. Determine whether there is evidence at the 5% significance level that age group and influenza type are associated. Fully justify! Include hypotheses, test used, needed assumptions, test statistic, p-value, decision, and conclusion. HINT: you should put the frequencies into a matrix. Include the Observed and Expected Matrices in the report file.
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