Answer:
![E(\bar{x}) = 28520](https://tex.z-dn.net/?f=E%28%5Cbar%7Bx%7D%29%20%3D%2028520)
Standard error of mean = 689
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = $28,520
Standard Deviation, σ = $5600
Mean of sampling distribution =
![E(\bar{x}) = \mu = 28520](https://tex.z-dn.net/?f=E%28%5Cbar%7Bx%7D%29%20%3D%20%5Cmu%20%3D%2028520)
As per Central Limit Theorem, if the sample size is large enough, then the sampling distribution of the sample means follow approximately a normal distribution.
Sample size, n = 66
Since the sample size is large, we can use normal distribution for approximation.
Standard error of mean =
![\displaystyle\frac{\sigma}{\sqrt{n}} = \frac{5600}{\sqrt{66}} = 689.31 \approx 689](https://tex.z-dn.net/?f=%5Cdisplaystyle%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%20%3D%20%5Cfrac%7B5600%7D%7B%5Csqrt%7B66%7D%7D%20%3D%20689.31%20%5Capprox%20689)
Its 0.25. ez. i hope i helped :)
Answer:
250
Step-by-step explanation:
you have to use the fact that the big triangle and the small triangle are similar and write the proportions
we took half of the side because of ΔABD and ΔBD..
AB= (125*10)/10=125
is AB =125 then AC is duble AC= 2*125=250
Answer:
(4x + 12 ) - ( -8 ) =
4x + 20
Explanation:
Just add them up and form a equation ( this is for the second one )
A number that is greater than 714,587 is 1,000,000