3 years ago

I need 3 More questions answered on The back of The page by 11:00 That’s when I leave for class

Mathematics

1 answer:

kogti [31]3 years ago

7 0

Answer:

Number 23 is C Number 25 is A and Number 26 is D hope this helps :)

Step-by-step explanation:

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Step-by-step explanation:

Since we have given that

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Standard deviation = 6.12

We need to construct 95% confidence interval for the population.

so, z = 1.96

So, it becomes,

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=27.7\pm 1.96\times \dfrac{6.12}{\sqrt{50}}\\\\=27.7 \pm 1.69\\\\=(27.7-1.69,27.7+1.69)\\\\=(26.01,29.39)$

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