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gtnhenbr [62]
3 years ago
12

From a phone survey, a researcher determined that the true estimate for the proportion of voters who will reelect the mayor is l

ikely to be in the interval (0.39, 0.47) .
What is the survey’s margin of error?

Enter your answer in the box.
Mathematics
1 answer:
eduard3 years ago
6 0
Here, p^ = (0.39 + 0.47)/2 = 0.43

The given interval is (0.43 - 0.04, 0.43 + 0.04).

Therefore, the margin of error is 0.04.
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Suppose that a study of elementary school students reports that the mean age at which children begin reading is 5.4 years with a
Tpy6a [65]

Answer:

By the Central Limit Theorem, the mean of the sampling distribution of sample means would be 5.4 years.

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.

In this problem, we have that:

The mean for the entire population is 5.4 years.

So, by the Central Limit Theorem, the mean of the sampling distribution of sample means would be 5.4 years.

7 0
4 years ago
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leva [86]
He withdrew 20$, it says he starts with 45 but the equation says he has 25
4 0
4 years ago
What is sin E for this triangle?<br> Enter your answer in the boxes.
EleoNora [17]

Step-by-step explanation:

with reference angle E

perpendicular (p) = e

base(b) = g

hypotenuse (h) = f

so Now

Sin E

= p/h

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8 0
3 years ago
Can someone help me with my homework please
Otrada [13]

Answer:

this answer is perfect I hope enjoy it

7 0
3 years ago
PLEASE HELP I DONT GET THIS AND MY MOM IS MAD AT ME
Tatiana [17]

Answer:

132.2 ft

Step-by-step explanation:

This is a right angle problem where 32 is the angle and 200 feet is the leg unederneath. To solve for the height we use tangent since we have the adjacent side and we are solving for the opposite side.

Steps:

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2. (tan32)200=x

3. x=132.2 ft

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3 years ago
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