How do the random errors differ from systmetic errors?

How do the archae differ from the bacteria ?

How do cathode rays differ from anode rays?

How do angiosperms differ from gymnosperms ?

The random error in the arithmetic mean of 100 observations is x, then random error in the arithmetic mean of 400 observations would be

How do gymnosperms and angiosperms differ from each other?

How do antiseptics differ from disinfectants?

if the randon error in the arithmetic mean of 50 observations is alpha , then the random error in the arithmetic mean of 150 observations would be

How do annelid animals differ from arthropods?

How do paraffins differ from unsaturated hydrocarbons ?

What is an error?