PreparED Study Materials
Notes
Videos
Chi-Square Observations: Probability of Exceeding 7.779
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover how to compute the likelihood of observations exceeding a certain value in a chi-square distribution with 4 degrees of freedom. Using the binomial distribution formula, evaluate the chances of at most 3 out of 15 observations surpassing the 7.779 mark. Results highlight the intricacies of data distributions.
Americans on Marriage: Statistical Insights from a Sample
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Review a Pew Research Center study on Americans' beliefs about marriage. Through statistical analysis, understand the sampling distribution, standard deviation, and the probabilities surrounding various beliefs. The insights detail public sentiments and the significance of sample outcomes.
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.
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.
Job Trends Analysis: Normal Approximation & Z-Values
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the nuances of determining the likelihood of specific employment patterns using statistical methods. Understand the application of the normal approximation to the binomial distribution and the role of z-values in probability determinations. Gain clarity on interpreting employment trends with the help of a standard normal table.
Lake Macatawa Bacteria: 90% Confidence Analysis
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover the method to analyze bacteria colonies in Lake Macatawa's east basin. Using 30 samples, we compute a 90% confidence interval for the mean colony count. Learn the steps of statistical analysis in environmental studies.













