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4 years ago

12

the scale on the map of Virginia shows that 1 inch represents 30 miles.the actual distance from rochmond Virginia to Washington

dc is 110 miles how many inches are between the two cities

1 answer:

Setler [38]4 years ago

3 0

the answer is 3 and 2/3 of an inch

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Answer: 543

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Given : Level of confidence = 0.98

Significance level : $\alpha=1-0.98=0.02$

By using the normal distribution table,

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Margin of error : $E=5\%=0.05$

The formula to find the population proportion if prior proportion of population is unknown :-

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$\Rightarrow n=0.25(\dfrac{2.33}{0.05})^2=542.89\approx543$

Hence, the company survey minimum sample having size =543

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