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11111nata11111 [884]
3 years ago
6

Is (9,9) a solution of the following linear

Mathematics
1 answer:
AlekseyPX3 years ago
5 0
Yes

(x,y)
(9,9)

17(9) - 9(9) = 72
153 - 81 = 72

(9) - 9(9) = -72
9 - 81 = -72
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A research company desires to know the mean consumption of meat per week among people over age 23. A sample of 164 people over a
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Answer:

The 80% confidence interval for the mean consumption of meat among people over age 23 is between 4 and 4.2 pounds.

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We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.8}{2} = 0.1

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

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The upper end of the interval is the mean added to M. So it is 4.1 + 0.07 = 4.17 pounds

Rounded to one decimal place

The 80% confidence interval for the mean consumption of meat among people over age 23 is between 4 and 4.2 pounds.

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