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Nastasia [14]
3 years ago
10

If 3x2 – 2x + 7 = 0, then (x – 1/3)^2=

Mathematics
2 answers:
xz_007 [3.2K]3 years ago
7 0
I'm not sure but I think the answer might be, (3x-1)^2/9
Rina8888 [55]3 years ago
4 0
-20/9 would be the answer, i think
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Answer:

The 99% confidence interval would be given (11.448;14.152).

Step-by-step explanation:

1) Important concepts and notation

A confidence interval for a mean "gives us a range of plausible values for the population mean. If a confidence interval does not include a particular value, we can say that it is not likely that the particular value is the true population mean"

s=16.6 represent the sample deviation

\bar X=12.8 represent the sample mean

n =1003 is the sample size selected

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\alpha=1-0.99=0.01 represent the significance level.

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The confidence interval for the mean would be given by this formula

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We can use a z quantile instead of t since the sample size is large enough.

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