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3 years ago

15

no fake answers for the last time and no links please I will actually report you. answer the question and EXPLAIN it!!!!

1 answer:

Alex787 [66]3 years ago

7 0

Answer:

Well, if the inequality is g<6, the second graph would be correct. (6 with the open circle)

Step-by-step explanation:

A open circle indicates that the solution is greater than or less than. There is a simple way I like to do it, if the sign is going to the right, you would have to graph to the left. That is just a simple way you can do it. But, the answer is the second graph. (Top left corner)

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The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p

VLD [36.1K]

Answer:

$3.13$

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 67

Variance = 3.85

We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

Level of significance = 0.2

Chi square critical value for lower tail =

$\chi^2_{1-\frac{\alpha}{2}}= 51.770$

Chi square critical value for upper tail =

$\chi^2_{\frac{\alpha}{2}}= 81.085$

80% confidence interval:

$\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}$

Putting values, we get,

$=\dfrac{(67-1)3.85}{81.085} < \sigma^2 < \dfrac{(67-1)3.85}{51.770}\\\\=3.13$

Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.

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3 years ago

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Maksim231197 [3]

Answer:

My answer is letter A in a graph

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3 years ago

What is the image of (-3,-5)) after a reflection over the x-axis?

Vedmedyk [2.9K]

Answer:

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Step-by-step explanation:

When you reflect over the x axis, the y value's sign changes.

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ivann1987 [24]

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nataly862011 [7]

Hi,

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