Lesson 1:

• Sample mean = Population Mean
• Sample Standard Deviation = Population Standard Deviation/sqrt(number of samples) = Standard Error
• z score indicates how many standard deviation is an element from the mean
• Distribution of sample means is sampling distribution
• Point Estimate
• Mean of Treated Population vs Sample Mean
• In a normal distribution, 68% of sample falls in one Sample SD and 95% SD fall in two Sample SD
• 2 * Sample SD is margin of error
• 95% Confidence Interval is mean +/- margin of error
• 95% of sample means are within 1.96 Standard Errors from the population mean in a sampling distribution