Find the mean and standard deviation for the set of data. {7,21,19,18,16,11,5,14,15}
A. mean: 14; standard deviation: 5.2
B. mean: 15; standard deviation: 5.2
C. mean: 15; standard deviation: 5.1
D. mean: 14; standard deviation: 5.1

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Which of the following circles have their centers in the third quadrant?

Find each value of the five-number summary for this set of data. [note: type your answers as numbers. do not round.] 46, 19, 38, 27, 12, 38, 51 minimum maximum median upper quartile lower quartile