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hoa [83]
3 years ago
7

PLSS HELPP MEE

Mathematics
1 answer:
Anestetic [448]3 years ago
3 0
208.53 is the anwser
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According to a study conducted in one​ city, 3838​% of adults in the city have credit card debts of more than​ $2000. A simple r
Maksim231197 [3]

Answer:

The sampling distribution of the sample proportion of adults who have credit card debts of more than​ $2000 will be normally distributed with mean = 0.38 and standard deviation of 0.034.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p, the sampling distribution will be normally distributed with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

In this problem, we have that:

n = 200, p = 0.38

So

s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.38*0.62}{200}} = 0.034

The sampling distribution of the sample proportion of adults who have credit card debts of more than​ $2000 will be normally distributed with mean = 0.38 and standard deviation of 0.034.

5 0
3 years ago
A rectangle has a height of 4 and a length of 3. What is the area of a scaled copy of this shape, if the scale factor is 2
Juliette [100K]

Answer:

48 units²

Explanation:

4(2)*3(2)

8*6

48

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3 years ago
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