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Would the mean and standard deviation be negative if the set has only negative values?
The mean would be negative, but standard deviation is always positive.
To multiply a negative number and a negative number you should multiply their absolute values and make the product negative true or false?
That is false. A negative times a negative is always a positive. Since absolute numbers are always positive if you make it negative that is not correct.
Why is the product of two absolute values is always a positive number?
This is not strictly true, because an absolute value, and hence the product of two absolute values can be zero. It is, therefore true to say that the product of two absolute values is always non-negative. An absolute value of a number is, by definition, non-negative. And by the definition of multiplication, the product of two non-negative numbers in non-negative.
Is a negative plus a negative a positive?
No. A negative plus a negative will always be negative. Adding negatives just makes them more negative, just like adding positives makes them more positive.If you're thinking of multiplication, then the answer is yes. Like signs result in positive values. Opposite signs result in negative values.
Array subscripts are always a large numbers b characters c negative values d integers?
d integers
