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Vikki [24]
3 years ago
14

Give an estimate of the mean hardness that you would expect after 37 and 41 hours; and a 85% confidence interval for each estima

te. which confidence interval is wider and why is it wider?
Mathematics
1 answer:
Jlenok [28]3 years ago
4 0
The predicted value of hardness at 37 hours is 243.87 and an 85% confidence interval for the mean hardness is (242.12, 245.61). At 41 hours, the predicted hardness is 252 and an 85% confidence interval for mean hardness is (249.83, 254.18). The confidence interval for X is equals to 41 which is wider because the value 41 is farther away from the sample mean X than is 37. As an outcome, the standard error for the prediction is larger.
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Write an equivalent expression for 25x - 45 using the properties of operations. Hint: find the GCF of 25 and 45. You use parenth
Oksana_A [137]

Answer:

25x - 45 = 5(5x - 9)

Step-by-step explanation:

Find the greatest common factor (GCF) of 25 and 45.

You can do this several ways, but one way is to list all the factors of both numbers and find the greatest common one:

Factors of 25: 1, 5, 25

Factors of 45: 1, 3, 5, 9, 15, 45

Therefore, 25 and 45 have 2 common factors: 1 and 5

So the greatest common factors is 5

25x - 45 = 5(ax - b)

To find the value of a, simply divide 25 by 5: 25 ÷ 5 = 5

To find the value of b, divide 45 by 5: 45 ÷ 5 = 9

25x - 45 = 5(5x - 9)

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3 years ago
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kaheart [24]

Answer:

Step-by-step explanation:

domain = {-7, 6, 1}

range = {-4,0}

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3 years ago
Solve for x.
Zigmanuir [339]
X/2 >= -4
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3 years ago
Please help!!! I will mark best answer!
Kisachek [45]

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7 0
3 years ago
Please help quickly Evaluate the expression: -|5+(2-8)|+|7(2-8)|
DanielleElmas [232]

 

\displaystyle\\-\Big|5+(2-8)\Big|+\Big|7(2-8)\Big|=\\\\=-\Big|5+(-6)\Big|+\Big|7\times(-6)\Big|=\\\\=-\Big|-1\Big|+\Big|-42\Big|=\\\\=-(+1)+42=\\\\=-1+42=\boxed{\bf41}




4 0
3 years ago
Read 2 more answers
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