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tresset_1 [31]
3 years ago
9

Four research teams each used a different method to collect data on how fast a new iron skillet rusts. Assume that they all agre

e on the sample size and the sample mean (in days). Use the (confidence level; confidence interval) pairs below to select the team that has the smallest sample standard deviation.
A. Confidence Level: 99.7%; Confidence Interval: 40 to 40
B. Confidence Level: 95%; Confidence Interval: 40 to 50
C. Confidence Level: 68%; Confidence Interval: 43 to 47
D. Confidence Level: 95%; Confidence Interval: 42 to 48
Mathematics
2 answers:
svet-max [94.6K]3 years ago
6 0

Answer: for how fast paint dries problem the answer is 68% with A confidence interval of 44.5 to 45.5

Step-by-step explanation: apex

Sati [7]3 years ago
4 0

Answer:

D. Confidence Level: 95%; Confidence Interval: 42 to 48

Step-by-step explanation:

48-42=6

6/2=3

3 is smallest

I tested A and got it incorrect so D is the awnser

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pochemuha

Answer:

y =  2*x^2 - 2*x - 24

Step-by-step explanation:

If we have a quadratic function with roots a and b, we can write the equation for that function as:

y = f(x) = A*(x - a)*(x - b)

Where A is the leading coefficient.

In this case, we know that the roots are: 4 and -3

Then the function will be something like:

f(x) = A*(x - 4)*(x - (-3) )

f(x) = A*(x - 4)*(x + 3)

Now we need to determine the value of A.

We also know that the graph of the function passes through the point (3, -12)

This means that:

f(3) = -12

Then:

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-12 = A*(-1)*(6)

-12 = A*(-6)

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Then the equation is:

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Now we need to write this in standard form, so we just need to expand the equation:

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Then the relation is:

y =  2*x^2 - 2*x - 24

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