Question: two random variables A and B follow normal distribution but their means and variances are unknown. take a sample of 40 from each random variable.

two random variables A and B follow normal distribution but their means and variances are unknown. take a sample of 40 from each random variable. for A - sample mean is 80 and sample variance is 25, for B- sample mean is 85 and sample variance is 36. find the 95% confidence interval for the difference between population means of A and B. based on confidence level can you conclude that the mean variable B is higher

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3. If there are reasonable alternatives, think about your decisions based on the different reference points and see if there are any contradictions in the decisions.

4. It is only at this point that you can give the problem your full attention in relation to the various ways you have framed the problem.