# STAT 325: Intro to Statistics

### School: Kansas State University

Number of Notes and Study Guides Available: 3

### Videos

##### Cereal Box Weights: Z-Scores, Probabilities & Truth Behind Claims

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Explore the intricacies of evaluating cereal box weights using Z-scores and normal distribution. By examining both individual boxes and a sample mean, understand the probabilities of achieving certain weight values. Gain insights into how statistical tools help interpret real-world product claims.

##### 42.1 Web Visits: How It Stacks Up to U.S. Average

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Explore how hypothesis testing is used to compare a sample mean of Internet visits to the national average. Through calculations and statistical analysis, we determine if a sample of users' web usage significantly deviates from the average U.S. web usage.

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##### Pet Phone Calls: Validating a 37% Claim with Z-test

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Explore a claim from the American Animal Hospital Association that 37% of pet owners communicate with their pets over the phone. Through hypothesis testing and a z-test, evaluate a skeptical veterinarian's doubts. Conclusions shed light on pet owners' unique communication habits.

##### 011 Car Colors in North America: Trends & Visual Insights

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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.

##### Analyzing Grade Variance: Is it More than Usual? A Chi-Square Test

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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.