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3 years ago

5

The average resident of a country uses 100 gallons of water per day. The population of the country is about 3.23 * 10^8 . About

how many gallons of water do the country's residents use each day? Express your answer in scientific notation.

1 answer:

Maru [420]3 years ago

4 0

Answer:

3.23×1010

Step-by-step explanation:

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Answer: a. 0.542

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Step-by-step explanation:

Let p be the population proportion of parents spend too little time with their children because of work commitments

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n= 369

$\hat{p}=\dfrac{200}{369}=0.542005420054\approx0.542$

Since the sample proportion is the best estimate for the population proportion.

So , the point estimate of the proportion of the population of working parents who feel they spend too little time with their children because of work commitments = 0.542

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Margin of error : $E=z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

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The margin of error = 0.051

Confidence interval : $\hat{p}\pm E$

$0.542\pm0.051\\\\=(0.542-0.051,\ 0.542+0.051)\\\\=(0.491,\ 0.593)$

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Answer:

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Answer:

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Step-by-step explanation:

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