2 years ago

Please answer correctly

Mathematics

1 answer:

katrin [286]2 years ago

5 0

Answer:

-5/2

Step-by-step explanation:

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boyakko [2]

Answer:

Step-by-step explanation:

Brainliest??? plzzzz <em>L</em>(-_-)7

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3 years ago

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The weekly earnings of students in one age group are normally distributed with a standard deviation of 47 dollars. A researcher

ELEN [110]

Answer:

Option D) 340

Step-by-step explanation:

We are given the following in the question:

Alpha, α = 0.05

Population standard deviation, σ = $47

Margin of error = 5

95% Confidence Interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

$\text{Margin of error} = z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$5 = 1.96(\dfrac{47}{\sqrt{n}} )\\\\\sqrt{n} = \dfrac{47\times 1.96}{5}\\\\n = 339.443776\\\Rightarrow n \approx 340$

Thus, the correct answer is

Option D) 340

7 0

3 years ago

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Sati [7]

Answer:

12/32 divide by 4 and get 3/8 you can’t simplify any further after that

Step-by-step explanation:

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3 years ago

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Alex Ar [27]

I think it would be A because if you multiply the square by a 30 thinking there all the same space between it will give u 120 square yards

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3 years ago

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-26 =3v +1 can i please get a answer

garik1379 [7]

Answer:

v = -9

Step-by-step explanation:

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3 years ago

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