EIP - Choice of Test and Confidence Intervals - Week 8

Question 1

Describe what a 95% confidence interval means.

Answer 1

If the test was repeated 100 times, 95 of them would contain the true population value.

Question 2

What is the usual estimator of a population mean?

Answer 2

Sample mean

Question 3

Will different samples drawn from the same population produce the same or different values of the sample mean?

Answer 3

Different values

Question 4

What does the standard error of the mean represent?

Answer 4

It is the standard deviation of sample means over all possible samples

Question 5

How can the standard error of the mean be estimated?

Answer 5

It is standard deviation divided by the root of the sample size

Question 6

Define statistical significance.

Answer 6

How likely it is that the null hypothesis is true

Question 7

By itself, can the p-value tell us how important a given result is?

Answer 7

No

Question 8

What do confidence intervals indicate of an estimate?

Answer 8

The reliability of an estimate