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3 years ago

The world record for the longest journey driven by car is 626,960 km. The longest journey by tractor is 21,199 km.

2 answers:

6 0

If you round both numbers to ten thousand car would be 630,000 and tractor would be 20,000. Approximate means estimate and not exact.
630,000-20,000=610,000
The approximate distance is 610,000.
Miles= 379,036

earnstyle [38]3 years ago

5 0

The answer is 605,761 because when it says difference you must subtract.

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2 years ago

M/2=m+1/10 simplify and solve for m

lapo4ka [179]

M/2=m+1/10
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3 years ago

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3 years ago

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To estimate a population mean, the sample size needed to provide a margin of error of 3 or less with a 95% confidence when the p

Over [174]

Answer:

The minimum sample needed to provide a margin of error of 3 or less is 52.

Step-by-step explanation:

The confidence interval for population mean (μ) is:

$\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

The margin of error is:

$MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

Given:

MOE = 3

σ = 11

The critical value for 95% confidence interval is: $z_{\alpha /2}=1.96$

**Use the z-table for critical values.

Compute the sample size (n) as follows:

$MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=1.96\times \frac{11}{\sqrt{n}}\\n=(\frac{1.96\times11}{3} )^{2}\\=51.65\\\approx52$

Thus, the minimum sample needed to provide a margin of error of 3 or less is 52.

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3 years ago

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