Calculate the surface area and show work :) please help me no links!!
1 answer:
Answer:
294 in.²
Step-by-step explanation:
I believe this figure is a rectangular prism.
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<u>Explain:</u>
To find the surface area of a rectangular prism, use this formula:
or
A phrase I use to help remember this formula is:
LISA WILSON LOST HER WITCH HAT TWICE (2)
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<u>Solve:</u>
The length of this rectangular prism is 9 in.
This width is 10 in.
The height is 3 in.
Now, I will plug the numbers into the first formula.
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<u>Conclude:</u>
I, therefore, believe the area of this rectangular prism is 294 in.²
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Answer:
As the sample size increases, the variability decreases.
Step-by-step explanation:
Variability is the measure of actual entries from mean. The less the deviations the less would be the variance.
For a sample of size n, we have by central limit theorem the mean of sample follows a normal distribution for random samples of large size.
X bar will have std deviation as
where s is the square root of variance of sample
Thus we find the variability denoted by std deviation is inversely proportion of square root of sample size.
Hence as sample size increases, std error decreases.
As the sample size increases, the variability decreases.