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V125BC [204]
4 years ago
14

The batteries produced in a manufacturing plant have a mean time to failure of 30 months, with a standard deviation of 2 months.

I select a simple random sample of 400 batteries produced in the manufacturing plant. I test each and record how long it takes for each battery to fail. I then compute that the average failure time of the 400 batteries is 29.9 months with a standard deviation of 2.15 months. In this scenario, the value 30 is:
Mathematics
1 answer:
Oduvanchick [21]4 years ago
8 0

Answer:

The population mean.

Step-by-step explanation:

29.9 is the <u>sample</u> mean.

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A jar contains two red marbles, three green marbles, ten white marbles and no other marbles. two marbles are randomly drawn from
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There is a 50$ fee to rent out a bouncy house, plus 20$ per hour.
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3 years ago
Write the equation of the line in Point-Slope Form given the information below. Use Point One. point 1=(-1,-1) Point 2-(0,4)
netineya [11]

Answer:

             \bold{y+1=5(x+1)}

Step-by-step explanation:

m=\dfrac{y_2-y_1}{x_2-x_1}\\\\(-1,\,-1)\ \implies\ x_1=-1\,,\ y_1=-1\\(0,\,4)\ \implies\ x_2=0\,,\ y_2=4\\\\m=\dfrac{4-(-1)}{0-(-1)}=\dfrac{5}{1}=5

y-y_1=m(x-x_1)      - point-slope form of Equation of the Line

x_1=-1\,,\ y_1=-1\,,\ m=5\\\\equation:\\{}\qquad\qquad y-(-1)=5\big(x-(-1)\big)\\\\{}\qquad\qquad y+1=5\big(x+1\big)

6 0
3 years ago
Find the mean absolute deviation for the set {-32, 9, 11, 12}
Zolol [24]
<h3>Answer:</h3>

A

Step-by-step explanation:

{-32, 9, 11, 12}

first, find the mean (Find the sum of the data values, and divide the sum by the number of data values )

(-32) + 9 + 11 + 12 = 0

0/0 = 0

then, find the absolute value of the difference between each data value and the mean: |data value – mean|.

-32 - 0= -32

9 -0 = 9

11 -0 = 11

12 -0 = 0

finally, find the sum of the absolute values of the differences. Divide the sum of the absolute values of the differences by the number of data values.

0 - 0 / 4 = 0

answer is 0 (A)

7 0
4 years ago
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