4 years ago

Pls help i dont know what to do

Mathematics

2 answers:

ad-work [718]4 years ago

7 0

Answer:

-26

Tip for solving related problems: use order of operations

8090 [49]4 years ago

6 0

Answer:

-26

Step-by-step explanation:

-5 x 7=-35

-35 + 9=-26

5/5=1

-26 x 1=-26

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Vinil7 [7]

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Given : Level of significance : $1-\alpha:0.99$

Then , significance level : $\alpha: 1-0.99=0.01$

Since , sample size : $n=300$ .

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The confidence interval for population proportion is given by :-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$0.2\pm(2.576)\sqrt{\dfrac{0.2(1-0.2)}{329}}\\\\\approx0.2\pm0.057\\\\=(0.2-0.057, 0.2+0.056=(0.143,\ 0.257)$

Hence, the confidence interval for the population proportion with a 99% confidence level= (0.143, 0.257)

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