PreparED Study Materials
Notes
Videos
Analyzing Teen Texting: Confidence Interval & Plausibility
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover how to calculate the 95% confidence interval for a population proportion using sample data. Through a practical example about texting habits among American teens, learn the implications of this statistical tool and how to assess plausibility.
011 Car Colors in North America: Trends & Visual Insights
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover the trends in car colors for North America in 2011. Break down the percentage distribution of various shades, from dominating whites to the less frequent greens. Understand the best visual techniques to represent this data, weighing the pros and cons of graphs.
Poisson Analysis: Asthma ED Visits in Seattle
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Unpack a Seattle-based study on Emergency Department asthma visits using the Poisson distribution. Explore the probability of visit frequencies and derive insights on healthcare patterns. Conclusions provide a statistical overview of asthma-related ED attendance.
Electronic Failures: Deciding Between Minor & Major Defects Cost-Effec
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover the intricacies of determining the cause of electronic system failures, either minor or major defects, using statistical distributions. Learn how to minimize the expected cost and make informed decisions based on soundings and loss tables
Testing the 123-Gallon Daily Water Claim: Fact or Fiction?
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the claim that average daily water consumption is 123 gallons. Using statistical testing, we evaluate a new sample against the Old Farmer’s Almanac claim. Learn how to interpret p-values and t-scores in hypothesis testing.
Uniform Data: Probabilities of Sample Means
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
This video offers a comprehensive look into the discrete uniform population, analyzing a sample size of 54 selected with replacement. Through calculated steps, viewers learn how to determine probabilities for a sample mean within specified limits. Utilizing Z-scores and standard normal tables, the session illuminates statistical principles in real-world scenarios.














