Which operation do you think of when you see the word of

Given the conditional statement, match the following. conditional statement: if two lines intersect, then their intersection is one point.

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

True or false look at the picture pls : /