Testing and Estimating

Testing and Estimating mKnown Let be a random variable that represents micrograms of lead per liter of water (ug/l). An industrial plant discharges water into a creek. The Environmental Protection Agency has studied the discharged water and found to have a normal distribution, with σ= 0.7ug/l

 (a) The industrial plant says that the population mean value of is μ = 2.0 ug/l. However, a random sample of = 10 water samples showed that width== 2.56ug/l. Does this indicate that the lead concentration population mean is higher than the industrial plant claims? Use a = 1%.

(b) Find a 95% confidence interval for μusing the sample data and the EPA value for σ.

(c) How large a sample should be taken to be 95% confident that the sample mean width=is within a margin of error = 0.2 ug/l of the population mean?

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Testing and Estimating

Testing and Estimating mKnown Let be a random variable that represents micrograms of lead per liter of water (ug/l). An industrial plant discharges water into a creek. The Environmental Protection Agency has studied the discharged water and found to have a normal distribution, with σ= 0.7ug/l

 (a) The industrial plant says that the population mean value of is μ = 2.0 ug/l. However, a random sample of = 10 water samples showed that width== 2.56ug/l. Does this indicate that the lead concentration population mean is higher than the industrial plant claims? Use a = 1%.

(b) Find a 95% confidence interval for μusing the sample data and the EPA value for σ.

(c) How large a sample should be taken to be 95% confident that the sample mean width=is within a margin of error = 0.2 ug/l of the population mean?

Just in case you need an assignment done, hire us. Using our writing services will make your life easier because we deliver exceptional results. Use us to get an A!

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course-preview

275 words per page

You essay will be 275 words per page. Tell your writer how many words you need, or the pages.


12 pt Times New Roman

Unless otherwise stated, we use 12pt Arial/Times New Roman as the font for your paper.


Double line spacing

Your essay will have double spaced text. View our sample essays.


Any citation style

APA, MLA, Chicago/Turabian, Harvard, our writers are experts at formatting.


We Accept

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Testing and Estimating

Testing and Estimating mKnown Let be a random variable that represents micrograms of lead per liter of water (ug/l). An industrial plant discharges water into a creek. The Environmental Protection Agency has studied the discharged water and found to have a normal distribution, with σ= 0.7ug/l

 (a) The industrial plant says that the population mean value of is μ = 2.0 ug/l. However, a random sample of = 10 water samples showed that width== 2.56ug/l. Does this indicate that the lead concentration population mean is higher than the industrial plant claims? Use a = 1%.

(b) Find a 95% confidence interval for μusing the sample data and the EPA value for σ.

(c) How large a sample should be taken to be 95% confident that the sample mean width=is within a margin of error = 0.2 ug/l of the population mean?

Just in case you need an assignment done, hire us. Using our writing services will make your life easier because we deliver exceptional results. Use us to get an A!

We are the Best!

course-preview

275 words per page

You essay will be 275 words per page. Tell your writer how many words you need, or the pages.


12 pt Times New Roman

Unless otherwise stated, we use 12pt Arial/Times New Roman as the font for your paper.


Double line spacing

Your essay will have double spaced text. View our sample essays.


Any citation style

APA, MLA, Chicago/Turabian, Harvard, our writers are experts at formatting.


We Accept

Secure Payment
Image 3