Correlation versus causation: Suppose that you see a data set that shows a positive linear relationship between students’ GPAs and their SAT scores. Can you conclude that earning a higher GPA leads to a higher SAT score? Absolutely not. You can only conclude a positive correlation between GPA and SAT score. It could be the[…]
The residual: In statistics, we learn that the residual is the leftover-the unexplained. The concept of a residual or leftover unexplained portion of a puzzle emerges in standardized reading passages. Consider a passage in which the author describes an audience who sees scientific evidence for a cancer treatment but does not express support for the[…]
The transitive property: I often tell my students that half of the SAT is understanding the transitive property. If an apple is an orange and an apple is a grape. What do you know? You know that an orange is a grape. Similarly, if an apple is an orange and an orange is a grape,[…]
Jane borrowed $1,200.00 to buy a phone. The interest rate was 18%. How much interest must Jane pay?
The bank paid Bryan 6.5%interest on $400 in his savings account. How much money did the bank pay Bryan for using his money for one year?