Anderson GiminoDetermine if data has statistical significanceA hypothesis test can help you determine whether your observed data is statistically significant, or likely due to chance. For example, in…Jul 14, 2023Jul 14, 2023
Anderson GiminoType I and type II errorsHowever, because hypothesis testing is based on probability, there’s always a chance of drawing the wrong conclusion about the null…Jul 14, 2023Jul 14, 2023
Anderson GiminoDifferences between the null and alternative hypothesesData professionals conduct a hypothesis test to decide whether the evidence from their sample data supports either the null hypothesis or…Jul 14, 2023Jul 14, 2023
Anderson GiminoConstruct a confidence interval for a small sample sizeSo far, you’ve constructed confidence intervals for large sample sizes, which are usually defined as sample sizes of 30 or more items. For…Jul 12, 20231Jul 12, 20231
Anderson GiminoConfidence intervals: Correct and incorrect interpretationsTo better understand your data, and effectively communicate your results to stakeholders, it’s important to know how to correctly interpret…Jul 12, 20232Jul 12, 20232
Anderson GiminoInfer population parameters with the central limit theoremData professionals use the central limit theorem to estimate population parameters for data in economics, science, business, and many other…Jul 5, 2023Jul 5, 2023
Anderson GiminoNon-probability sampling methodsA randomly chosen sample means that all members of the population have an equal chance of being included. In contrast, non-probability…Jul 5, 2023Jul 5, 2023
Anderson GiminoProbability sampling methodsProbability sampling uses random selection to generate a sample. Non-probability sampling is often based on convenience, or the personal…Jul 5, 2023Jul 5, 2023
Anderson GiminoThe stages of the sampling processAs a data professional, you’ll work with sample data all the time. Often, this will be sample data previously collected by other…Jul 5, 2023Jul 5, 2023
Anderson GiminoThe relationship between sample and populationEarlier, you learned that inferential statistics use sample data to draw conclusions or make predictions about a larger population. Data…Jul 5, 2023Jul 5, 2023
