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svetoff [14.1K]
1 year ago
8

using the central limit theorem, applied to the sampling distribution of the sample proportion, what conditions must be met?

Mathematics
1 answer:
const2013 [10]1 year ago
4 0

Using the central limit theorem, the conditions are:

The population should be symmetrical. If the population is skewed sample size should be sufficiently large at least 30.

Samples should be drawn strictly at random.

The sample observations should be independent.

The central limit theorem states that, under certain circumstances, the sampling distribution of the sample mean is roughly normal.

The circumstances are

I) The population ought to be balanced. If the population is skewed, the sample size should be at least 30.

ii) Samples must be chosen completely at random.

iii) Independent observations for the sample should be used.

The sample size must be large (e.g., at least 30) as the necessary condition.

Learn more about central limit theorem here:

brainly.com/question/14099217

#SPJ4

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Five yards of material is needed to make
Mkey [24]

Answer:

The y-coordinate would be 17.5

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form y/x=k or y=kx

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

Let

y ----->material needed in yards

x ----> number of curtains

we know that

For y=5, x=2

Find the value of the constant of proportionality k

k=y/x

substitute the given values of x and y

k=\frac{5}{2}=2.5

The linear equation is equal to

y=2.5x

If the x-coordinate was 7

then

substitute in the equation x=7 and solve for y

y=2.5(7)

y=17.5

therefore

The y-coordinate would be 17.5

6 0
3 years ago
In a sample of 400 voters, 360 indicated they favor the incumbent governor. The 95% confidence interval of voters not favoring t
Andru [333]

Answer:

0.071 to 0.129

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

In a sample of 400 voters, 360 indicated they favor the incumbent governor. This means that 400-360 = 40 do not favor the incumbent governor. So n = 400, \pi = \frac{40}{400} = 0.1

95% confidence interval

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.10 - 1.96\sqrt{\frac{0.10*0.90}{400}} = 0.071

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.10 + 1.96\sqrt{\frac{0.10*0.90}{400}}= 0.129

The correct answer is:

0.071 to 0.129

7 0
3 years ago
-3x-3y=3<br> 5x+y=-17 <br> What is the answer ?
barxatty [35]
-3x - 3y = 3     ⇒   -3x - 3y = 3
 5x + 1y = -17 ⇒ <u>-15x - 3y = 51</u>
                                    <u>12x</u> = <u>-48</u>
                                     12      12
                                        x = -4
                                5x + y = -17
                             5(-4) + y = -17
                               -20 + y = -17
                             <u>+ 20         + 20</u>
                                         y = 3
                                    (x, y) = (-4, 3)
5 0
3 years ago
What is 27 over 90 reduced to
AnnZ [28]
27 and 90 can both be divided by 9

27 divided by 9 = 3

90 divided by 3= 10

so your answer is 3 over 10
3 0
3 years ago
How do you change 36/10 to a decimal?
Elina [12.6K]
Divide 36 by 10
36/10=3.6
4 0
3 years ago
Read 2 more answers
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