PreparED Study Materials
Notes
Videos
Computing Probabilities: College Students & Computer Ownership
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Understand the probabilities of computer ownership among university first-year students through various scenarios. This video breaks down calculations for chances of ownership and non-ownership among random groups.
Probabilities with Poisson Variables X1 & X2
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Explore the complexities of two independent Poisson random variables, X1 and X2, with means ?1 = 2 and ?2 = 3. Understand the process of calculating specific event probabilities and the application of the Poisson formula. Key takeaways include the manipulation and interpretation of these statistical values.
Confidence Intervals for Bag Weights: A Statistical Guide
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Understand the process of determining the 94.26% confidence interval for the median weight of "80-pound" bags of water softener pellets using a standard normal table and specified formulas. Additionally, explore the steps to deduce a confidence level of 90.47%.
Analyzing Grade Variance: Is it More than Usual? A Chi-Square Test
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Discover the process of analyzing variance in midterm grades with a Chi-Square test. Understand the significance of high variance and its implications. Follow along as we assess a professor's suspicion about unusually varied student performance.
Crunching Car Sales Data: Size, Color, and Probability Insights
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Uncover the likelihood of different car combinations by size and color from a dealer's sales data. Learn how to calculate probabilities, from the chances of a small car being black to the odds a non-small car isn't gray. An insightful look into understanding car preferences.
Brand X vs. Brand Y: 95% Confidence in Voltage Difference
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Compare the voltages of Brand X and Brand Y batteries using statistical analysis. Learn how to determine a 95% confidence interval for their mean differences. Understand the process from data collection to interpretation of results.