Which of the following statements are true? ONLY ANSWER IF YOU KNOW THE ANSWER

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  A, D, F

Step-by-step explanation:

A: true

B: false; it is positive

C: false; it may be positive: -1 -(-2) = +1

D: true, a variation of A

E: false; for c < 0, the inequality symbol reverses

F: true. This is the definition of an additive inverse.

G: false; multiplying anything by zero gives zero

H: false; -(-1) = +1, not a negative

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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.