The following observations of a random variable have been
recorded: 3.2, 9.4, 6.4, 2.9 and 3.8. Compute a 90% confidence
interval for the expected value of the random variable.
(a) Enter the value of the upper bound of the confidence
interval in the box below (rounded to 3 decimal places)
Answer
(b) Enter the value of the lower bound of the confidence
interval in the box below (rounded to 3 decimal places)
Answer
In order for your confidence interval to be valid, do you need
to assume that the random variable is normally distributed?
a. Yes.
b. No.