This is part of Zalika's homework

A) Explain the mistake that Zalika made.

B) Work out the correct answer for her.

A) She did not covert them in the same unit before taking the difference

B) 72 - (180/100) = 70.2 cm²

Or,

(72×100) - 180 = 7020 mm²

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.