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maria [59]
3 years ago
7

Help please ASAP???

Mathematics
1 answer:
rusak2 [61]3 years ago
5 0

Answer:

B. y = -2x

and

C. y = 5x

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A physicist examines 25 water samples for nitrate concentration. The mean nitrate concentration for the sample data is 0.165 cc/
xz_007 [3.2K]

Answer:

The 80% confidence interval for the the population mean nitrate concentration is (0.144, 0.186).

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Step-by-step explanation:

We have to calculate a 80% confidence interval for the mean.

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The sample size is N=25.

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The t-value for a 80% confidence interval and 24 degrees of freedom is t=1.318.

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Then, the lower and upper bounds of the confidence interval are:

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The 80% confidence interval for the population mean nitrate concentration is (0.144, 0.186).

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