PreparED Study Materials
Videos
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:
full solution
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:
full solution
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.
Computing Probabilities: College Students & Computer Ownership
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
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.
Comparing Stock Returns & Volatility: T-test and F-test Insights
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Compare the mean returns and volatilities of two stocks using t-test and F-test methods. Through the application of hypothesis testing and P-value calculations, we determine which stock provides higher returns and which is riskier.
Sullivan's Algebra Scores: Frequency to Probabilities Analysis
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore Sullivan’s College Algebra homework score analysis, from frequency distribution construction to in-depth statistical calculations such as standard deviation. Discover histogram visualizations, mean and median interpretations, and probability estimations for various score thresholds. Utilize Excel functions for precise calculations.
Reaction Times in Anderson's Study: Analyzing Central Tendencies
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore Anderson's 1999 study on how attention load impacts reaction times. Through hands-on analysis, understand the computation of mean, median, and mode from the provided data. Highlighting the significance of the median in capturing the central tendency amidst potential outliers.








