Answer:
a is the answer, also it's true.
Often, variability is most usefully expressed in the same units as the original data. That's what <em>standard deviation</em> (square root of variance) does. In situations where that is the case, the variance is useful only for getting to the value of standard deviation.
Answer:
1/2
Step-by-step explanation:
The decimal 0.5 is equal to the fraction 1/2.
it can also be, 0.5 represent the fraction 5/10.
Answer:
less then 3
Step-by-step explanation:

we know that 7*7=49 so thus


therefor n=2
it is written as