Blog – Crammer Nation

What is a confidence interval? | Midterm Exam

June 21, 2022June 14, 2022 by Adam Wise

Imagine you’re watching A Christmas Story, and Ralphie just opened up his brand-new Red Ryder BB Gun on Christmas Day. Red Ryder claims that their guns … Read More

t-scores for means | Midterm Exam

June 21, 2022June 14, 2022 by Adam Wise

Here’s an example problem that deals with calculating a t-score for a given sample mean: Question: Red Ryder BB Guns claims that their rifles shoot … Read More

What is a t-score? | Midterm Exam

June 21, 2022June 13, 2022 by Adam Wise

t-scores are best used when you (1) are not given the population standard deviation or (2) do not have a sample size greater than 30. … Read More

Z-scores for means vs. proportions | Midterm Exam

June 21, 2022June 13, 2022 by Adam Wise

In our IQ example from What is a Z-score?, we were simply given a data point and asked to compute its Z-score based on the … Read More

Protected: Crammer Nation Formula explained – Pythagorean theorem

May 31, 2022May 31, 2022 by Adam Wise

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