A confidence interval is constructed from a sample data is a range of values that is likely to include the population parameter with a certain probability.
The objective of a confidence interval is to provide location and precision of population parameters.
Central Limit Theorem states that the sample means will be approximately normally distributed for large sample size regardless of the distribution from which the sample is taken.
Descriptive Statistics is about finding “what has happened” by summarizing the data using statistical methods and analyzing the past data using queries.
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