Empirical Rule The Empirical Rule applies to a normal, bell-shaped curve than is symmetrical about the mean. It states that within one standard deviation of the mean (both left-side and right-side) there is about 68% of… Empirical Rule and z-score Probability
Problem https://youtu.be/_SvoDf7Toi4 https://youtu.be/XWLsrGtLfAo
Here is a common problem from intro stats: [7.4.30t] A random sample of 100 observations from a population with a standard deviation of 44 yielded a sample mean of 108. Test the null hypothesis that… Single-sample z-test for the mean [7.4.30t]
This is a great 5-minute read – well worth your time. Spies, Crime, and Lightning Strikes: The Value of Probabilistic Thinking
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