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Vera_Pavlovna [14]

3 years ago

14

An isosceles triangle has a perimeter of 16. Two legs have length L an the center has a length of six. What is the area of the t

riangle?

1 answer:

Dmitriy789 [7]3 years ago

8 0

Answer:

Restate the question

Step-by-step explanation:

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3 years ago

What’s the answer???

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2 years ago

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What sample size is needed to give a margin of error within plus-or-minus 5% in estimating a population proportion with 90% conf

VARVARA [1.3K]

Answer: 271.

Step-by-step explanation:

When the prior population proportion of success is not available, then the formula to find the sample size is given by :-

$n=00.25(\dfrac{z_{\alpha/2}}{E})^2$

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By using the standard normal distribution table ,

Critical value : $z_{\alpha/2}=1.645$

Margin of error : $E=0.05$

Then , the required minimum sample size will be :-

$n=0.25(\dfrac{(1.645)}{0.05})^2=270.6025\approx271$

Hence, the required minimum sample size is 271.

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2 years ago