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Alex_Xolod [135]
3 years ago
11

How do you solve this, r-4<1

Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
7 0

Answer:

r <5

Step-by-step explanation:

r-4<1

Add 4 to each side

r-4+4<1+4

r <5

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Answer:

<em>The sample size 'n' = 721</em>

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 Step-by-step explanation:

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<em>The Margin of error is determined by</em>

<em></em>M.E = \frac{Z_{\frac{\alpha }{2} S.D} }{\sqrt{n} }<em></em>

0.03 = \frac{1.645 X \sqrt{0.40(1-0.40) } }{\sqrt{n} }

on calculation , we get

0.03√n = 0.8058

\sqrt{n} = \frac{0.8058}{0.03} = 26.86

squaring on both sides , we get

n = 721.45≅721

<u><em>conclusion</em></u>:-

<em>The sample size 'n' = 721</em>

<em>Number of cars 'n' = 721</em>

 

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