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Whitepunk [10]
3 years ago
9

I need help with a Delta math Assignment

Mathematics
1 answer:
sergey [27]3 years ago
8 0

Answer:

9

Step-by-step explanation:

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In the third week of July, a random sample of 40 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. A
suter [353]

Answer:

a. [6.6350,7.3950]

b. ME=0.5150

Step-by-step explanation:

a. Given that n=40, \bar x=6.88 and that:z_{\alpha/2}=z_{0.05}=1.645

The required 90% confidence interval can be calculated as:

\bar x\pm(margin \ of \ error)\\\\\bar x\pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}\\\\6.88\pm(1.645\times \frac{1.98}{\sqrt{40}})\\\\=[6.3650,7.3950]

Hence, the 90% confidence interval for the population mean cash value of this crop is [6.6350,7.3950]

b. The margin of error at 90% confidence interval is calculated as:

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Hence, the margin of error is 0.5150

8 0
3 years ago
Simplify the expression <br>algebra 2 high school math part 2 ​
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Answer:

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Step-by-step explanation:

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