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Question: problem 3 scientists have conducted a study on coronary blood...

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PROBLEM 3 Scientists have conducted a study on coronary blood flow velocity 18 people. The obtained results are as follows: 75, 77, 78, 77, 66, 77, 72, 69, 72, 72, 71, 69, 68, 64, 66, 62, 61,70 The values of that sample are modelled by a random variable which follows normal distribution Nu, σ2), where μ and σ are unknown. After a week scientists have again conducted this study on 12 different people and obtained a sample standard deviation equal to 3.21. At the significance level 0.03, verify the hypothesis that variance of blood flow velocity in group 1 is the same as variance of blood flow velocity in group 2
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