Biostatistics There is ONE question evalute this material a

Biostatistics - There is ONE question: evalute this material, along with many sub-questions (all refer to the same material).

Brief material: https://www.dropbox.com/s/j7eg5nh76ae4p3b/p1u.png?dl=0

Questions: https://www.dropbox.com/s/m9nu5ozrhjtajwp/p2.png?dl=0

(In case you need the full materials for understanding, but we are still ONLY use yellow-heighted to answer the questions: https://www.dropbox.com/s/uw09x1pcfz8pa60/fullb.pdf?dl=0 )

Solution

H0: Blue and white have the same mean.

Ha: Blue and white have different means

Two sided chi square test with df = 2

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Given chi square = 38.729 and p <0.001

As p value <0.01 we reject null hypothesis

Blue and white have different means and the difference is statistically significant at 99% confidence.