In: Statistics and Probability
What is an 80% confidence interval?
What does it mean for a confidence interval to be ‘equal tailed?’
What are the steps for obtaining a confidence interval?
# A Confidence Interval is a range of values we are fairly sure our true value mean lies in.
A 80% confidence interval has a 0.80 probability of containing the population mean. Or 80% of the population distribution is contained in the confidence interval.
# Equal-tailed Confidence interval means when for a given level of confidence the half of the area on the left side and half of the area on the ride side are equal.
For a confidence interval with level C, the area in each tail of the curve is equal to (1-C)/2. For a 95% confidence interval, the area in each tail is equal to 0.05/2 = 0.025.
# Steps for confidence interval: