Description: Learn how to solve any Confidence Interval for 1 Mean! This tutorial explains the formulas to use for 1 mean confidence intervals and where they comes from. There are 2 different forms of the formula you will see depending on whether you the population standard deviation is known or unknown. If the population SD is known, you will use a critical z value and the normal distribution for your confidence interval. If the pop. SD is unknown, you will use a critical t value and the t distribution for your CI. After we learn the 2 formulas, then we discuss the necessary conditions we need to satisfy before creating our 1 mean CI. Next, we help solidify this concept with working through 2 examples. One example is calculating the 1 mean CI when sigma is known and the other example calculates the CI when sigma is unknown.
