What is a Fireplace Worth
HomePrice Time Series Data
Correlation: Introduction to Relationships
In the last lesson, you learned about the Two-way Chi-square Test for Independence. Using it, you can determine if two categorical variables are independent. If two variables are not independent, they are related. Knowing something about one variable can tell you something about the other variable. In this lesson, you will explore further this idea …
Correlation and Chi-square Tests for Independence
The word “correlate” has several meanings, e.g. “If two or more facts, numbers, etc. correlate or are correlated, there is a relationship between them” (Cambridge Dictionary, n.d.) And “to show that a close connection exists between (two or more things)” (Merriam-Webster, 2019) Also, “to show that two things are connected.” (Macmillan, n.d.) In statistics, we often …
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Empirical Rule and z-score Probability
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 the data; within two standard deviations of the mean (both left-side and right-side) there is about 95% of the data; …
Two-sample Difference Between Proportions Z-test
Problem https://youtu.be/_SvoDf7Toi4 https://youtu.be/XWLsrGtLfAo
