2 years ago

4 x 1 still confused I think it is 5 4 or 7.

Mathematics

1 answer:

tigry1 [53]2 years ago

3 0

Answer:

4x1=4

Step-by-step explanation:

anything times itself is that number like 2x1=2

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Ou are trying to estimate the average amount a family spends on food during a year. In the past, the standard deviation of the a

MA_775_DIABLO [31]

Answer:

The answer is "2653".

Step-by-step explanation:

$Sample \ Size = 99\% \ Cl\\\\ E =60 \\\\\sigma= 1200\\\\$

Minimum sample size for Cl level $= 99\%$ and Desired Margin of Error, $E = 60$ is:

$\to P(|\bar{x}-\mu| < E) \geq 1-\alpha \\\\\to P(\frac{\bar{x}-\mu}{\frac{\sigma}{\sqrt{n}}}$

$Margin \ Error = \frac{\text{length of the CI}}{2}\\\\\sigma=1200\\\\\alpha=1 - Confidence =1-0.99=0.01\\\\Z_{\frac{\alpha}{2}}=z_{0.005}=2.58\\\\n\geq (\frac{z_{0.005} \times \sigma }{E})^2 \\\\= (\frac{2.58 \times 1200 }{60})^2\\\\=2662.560\\$

The minimum n has to be integer, we take the ceiling Of above number and get n = 2663

The exact z-value.

$n \geq (\frac{2.5758293035489 \times 1200}{60})^2 \\\\= 2653.95864$

using critical value of 2,575, which gives 2652.25

$\to n =2653$

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2 years ago

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trapecia [35]

Answer:

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Step-by-step explanation:

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lys-0071 [83]

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Zarrin [17]

Answer:

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4 x 1 still confused I think it is 5 4 or 7. ​

4 x 1 still confused I think it is 5 4 or 7.