PreparED Study Materials
STAT 220: Statistical Modeling for Engineers
School: Grand Valley State University
Number of Notes and Study Guides Available: 0
Videos
Probabilities with Poisson Variables X1 & X2
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
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.
Committee Selection: Breaking Down Probabilities
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Uncover the mathematical methods used to determine various probabilities when selecting committees. Utilize combination formulas and probabilities to evaluate different teacher-parent combinations.
Margin of Error: Decoding the Uncertainty in Estimates
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Unravel the concept of the "margin of error" within the context of estimating children's exposure to lead-based paint. Through clear explanations, comprehend the importance of acknowledging uncertainty in statistical findings and how it represents a range for potential true values.
Calcium in Chautauqua's Rain: 1990 vs. 2010 Analysis
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the calcium concentration in Chautauqua's rainwater from 2010, comparing it to 1990 levels. Using statistical tests, examine normal distribution and determine significant changes. The results provide insights into environmental shifts over two decades.
Exit Poll Analysis: Education Funding Referendum Votes
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the application of proportion z-tests in analyzing exit polling data. Understand how to determine the likelihood of sample results given a population proportion. Recognize the importance of considering non-sampling errors in interpreting exit poll outcomes.
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.












