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VLD [36.1K]
3 years ago
7

Find the perimeter of the figure.

Mathematics
1 answer:
Vesna [10]3 years ago
6 0
The answer would be 82 inches.
to get perimeter remember that all you need to do is add up all the sides of your figure.
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A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If
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Answer:

A)

Note that              

             

Lower Bound = X - z(alpha/2) * s / sqrt(n)              

Upper Bound = X + z(alpha/2) * s / sqrt(n)              

             

where              

alpha/2 = (1 - confidence level)/2 =    0.025          

X = sample mean =    1723.4          

z(alpha/2) = critical z for the confidence interval =    1.959963985          

s = sample standard deviation =    89.55083319          

n = sample size =    30          

             

Thus,              

             

Lower bound =    1691.355235          

Upper bound =    1755.444765          

             

Thus, the confidence interval is              

             

(   1691.355235   ,   1755.444765   ) [ANSWER]

*********************

b)

We assumed taht the distirbution of these observations is approximately normally distributed.

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c)

Yes, because the values are not far away from each other.

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