Answer:
No they are not equivalent
Answer:
A sample of 18 is required.
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Z-table as such z has a p-value of
.
That is z with a pvalue of
, so Z = 1.88.
Now, find the margin of error M as such
In which
is the standard deviation of the population and n is the size of the sample.
A previous study indicated that the standard deviation was 2.2 days.
This means that ![\sigma = 2.2](https://tex.z-dn.net/?f=%5Csigma%20%3D%202.2)
How large a sample must be selected if the company wants to be 92% confident that the true mean differs from the sample mean by no more than 1 day?
This is n for which M = 1. So
![\sqrt{n} = 1.88*2.2](https://tex.z-dn.net/?f=%5Csqrt%7Bn%7D%20%3D%201.88%2A2.2)
![(\sqrt{n})^2 = (1.88*2.2)^2](https://tex.z-dn.net/?f=%28%5Csqrt%7Bn%7D%29%5E2%20%3D%20%281.88%2A2.2%29%5E2)
![n = 17.1](https://tex.z-dn.net/?f=n%20%3D%2017.1)
Rounding up:
A sample of 18 is required.
Answer:
Correct option: third one -> 12
Step-by-step explanation:
In a polygon with 'n' vertex, we can trace diagonals from one vertex to all vertices, except to the vertex chosen and the two adjacent vertices (because we would have sides and not diagonals), so we would have 'n - 3' diagonals.
If we have a polygon with 15 vertex, the number of diagonals from one vertex is 15 - 3 = 12.
Correct option: third one
150-25=125mph
130-25=105
This means it was going 125mph and that it dropped an altitude of 25 degrees because of the wind and the slow down of the helicopter
Answer:
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