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nignag [31]
2 years ago
5

1 + 1 what is the best answer​

Mathematics
1 answer:
Viefleur [7K]2 years ago
3 0

Answer:

The best answer is 2 yaya that is a sum 1 + 1 is equal to 2

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A pew research Center project on the state of news media showed that the clearest pattern of news audience growth in 2012 came o
KengaRu [80]

Answer:

Step-by-step explanation:

Given that:

the sample proportion p = 0.39

sample size = 100

Then np = 39

Using normal approximation

The sampling distribution from the sample proportion is approximately normal.

Thus, mean \mu _{\hat p} = p = 0.39

The standard deviation;

\sigma = \sqrt{\dfrac{p(1-p)}{n} }

\sigma = \sqrt{\dfrac{0.39(1-0.39)}{100} }

\sigma = 0.048

The test statistics can be computed as:

Z = \dfrac{{\hat _{p}} - \mu_{_ {\hat p}} }{\sigma_{\hat p}}

Z = \dfrac{0.3 - 0.39 }{0.0488}

Z = -1. 8 4

From the z - tables;

P (\hat p \le 0.3 ) = P(z \le -1.84)

\mathbf{P (\hat p \le 0.3 ) = 0.0329}

(b)

Here;

the sample proportion = 0.39

the sample size n = 400

Since np = 400 * 0.39 = 156

Thus, using normal approximation.

From the sample proportion, the sampling distribution is approximate to the mean \mu_{\hat p} =  p = 0.39

the standard deviation \sigma_{\hat p} = \sqrt{\dfrac{p(1-p)}{n} }

\sigma_{\hat p} = \sqrt{\dfrac{0.39 (1-0.39)}{400} }

\sigma_{\hat p} =0.0244

The test statistics can be computed as:

Z = \dfrac{{\hat _{p}} - \mu_{_ {\hat p}} }{\sigma_{\hat p}}

Z = \dfrac{0.3 - 0.39 }{0.0244}

Z = -3.69

From the z - tables;

P (\hat p \le 0.3 ) = P(z \le -3.69)

\mathbf{P (\hat p \le 0.3 ) = 0.0001}

(c) The effect of the sample size on the sampling distribution is that:

As sample size builds up, the standard deviation of the sampling distribution decreases.

In addition to that, reduction in the standard deviation resulted in increases in the Z score, and the probability of having a sample proportion  that is less than 30% also decreases.

6 0
2 years ago
Solve x - 9 = 3 + y for y.
Mila [183]

Step-by-step explanation:

x - 9 - 3 = y \\ y = x - 12

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Lim x -4 sqrt x+20 - sqrt 12-x x^ 2 +3x-4 =
belka [17]
hey jay sorry for the phone number but i did not respond yet but i will text you back when you leave the office
8 0
2 years ago
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Hey can anyone help me with this problem please and thank you
krok68 [10]

Answer:

x=20

Step-by-step explanation:

7 0
2 years ago
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Can someone help me!?!?
amm1812

It's the first step.4x-x-2+6=6x+16     ##substract 2 rather an add 2

Check it carefully next time.!!

5 0
2 years ago
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