Math Notes

• anything that is more than 1/2 times the interquartile range below Q1 or above Q3. are going to be outliers

• IQR= Q3-Q1

• Outliers= <Q-1.5 x IQR or 7 Q3+ 1.5 x IQR

How to remember to change the direction of the sign when dividing or multiplying by a negative number Think of the negative sign as a bad thing, or losing something.
Think of the positive sign as a good thing, or gaining something.
( - )( + ) = losing something good = negative
( - )( - ) = losing something bad = positive
( + )( + ) = gaining something good = positive
( + )( - ) = gaining something bad = negative

There are two conversions we need to do: kilometers to meters, and hours to minutes. Let's look at kilometers to meters.