Question 1

The focus this week is on confidence intervals. Utilize the following information and answer the questions below. A 95% confidence interval obtained from a sample of 100 outpatients for the true population mean normal mean systolic blood pressure is given by (114 mmHG, 120 mmHG).

Provide a correct interpretation of this interval. Can you think of other interpretations that would also be correct?

This confidence interval came from a single sample, would we get the same interval if we obtained a different set of 100 patients? What does this imply about your interpretation of the given interval?

If we wanted a 99% confidence interval instead, can you tell whether it would be narrower or wider? Can you tell by how much?

Question 2

Everyone has seen or heard of a p-value. Consider your exposure and define what the p-value represents. Why can we compare it to alpha (the significance level of the test)? Last week we discussed confidence intervals. Consider what a p-value tells you that a confidence interval does not? What does a confidence interval tell you that a p-value does not? Which one is more useful? Make sure to support your ideas with reputable sources.