Both methods assume a normal distribution of the data, but the z-tests are most useful when the standard deviation is known.
OR u can use , z-tests are used when we have large sample sizes (n > 30), whereas t-tests are most helpful with a smaller sample size (n < 30). Both methods assume a normal distribution of the data, but the z-tests are most useful when the standard deviation is known.
She took 4 miles 4 times 4 is what and then that’s your answer
I'm pretty sure the answer is pi/2. Just plugged it in my calculator and it said error.
Yes it's A and B
The volume of the solid generated when R is revolved about the
x
-axis is
848
15
π
or approximately
177.6
.
The area of a circle with a radius equal to
8
−
x
3
2
at any given
x
is
π
⋅
(
8
−
x
3
2
)
2
.
= 848
15
π
≈
177.6
