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Marysya12 [62]
3 years ago
14

In a test of corrosion resistance, a sample of 62 Incoloy steel specimens were immersed in acidified brine for 4 hours, after wh

ich each specimen had developed a number of corrosive pits. The maximum pit depth was measured for each specimen. The mean depth was 850 μm with a standard deviation of 153 μm. The specification is that the population mean depth μ is less than 900 μm.
Find the P-value for testing H0 : μ ≥ 900 versus H1 : μ < 900.

Mathematics
1 answer:
Dmitry [639]3 years ago
7 0

Answer:

p-value = 0.0063

Step-by-step explanation:

PLEASE CHECK ATTACHMENT FOR COMPLETE SOLUTION AND STEP BY STEP EXPLANATION

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PLS HELP!! WILL MAKE BRAINLIEST!!!!
poizon [28]

Answer:

(86.2,0) is the x-intercept.

Step-by-step explanation:

You can use the slope formula to figure this one out:

Just use two of the points on the table, any of them will work:

(33,-22)\\(52,-33)

\frac{-22-33}{33-52} =\frac{-55}{-19}=\frac{55}{19}

Now you have the slope of the equation, now using the y-intercept equation you can substitute the variables for point of the table and the new slope.:

(71,-44)\\y=mx+b\\-44=\frac{55}{19} (71)+b

Now just solve for b to get the y intercept:

-44=\frac{55}{19}(71)+b\\-44= \frac{3905}{19} +b\\(-\frac{3905}{19})-44=\frac{3905}{19} +b(-\frac{3905}{19})\\   -\frac{4741}{19}=b

Now you have the y-intercept so you just have to plug in 0 to the y spot and it will calculate the x-intercept.

0=\frac{55}{19}x-\frac{4741}{19}\\(+\frac{4741}{19})0=\frac{55}{19}x-\frac{4741}{19}(+\frac{4741}{19})\\\\\frac{4741}{19}=\frac{55}{19}x\\\frac{\frac{4741}{19}}{\frac{55}{19} }= \frac{\frac{55}{19} x}{\frac{55}{19} } \\\frac{431}{5} =x\\or\\86.2=x

And that's the x-intercept.

5 0
2 years ago
Read 2 more answers
There are 100 sophomores at the school. 85% of them are good students. What would be the percent of good students at school if (
zubka84 [21]
The answer would be zero! I hope this helped!

4 0
3 years ago
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What’s the property name of s + (-s) = 0 /
valina [46]

Answer:

wowow

Step-by-step explanation:

4 0
3 years ago
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ZA and ZB are vertical angles. If mZA = (4x + 14) and mZB = (5x – 5)°,
ivolga24 [154]

Answer:

90°

Step-by-step explanation:

Since they are vertical angles, they equal eachother

4x+15=5x-5

add the 5 to both sides

4x+19=5x

subtract the 4x from both sides

x=19

Then you have to plug in 19 to find the measure of ZA

4(19)+14

76+14

90

6 0
4 years ago
What is the length of segment AB? (1 point) Coordinate grid shown from negative 8 to positive 8 on both x axis and y axis at int
Marina CMI [18]

Answer:

<h2>The distance between points A and B is 8.5 units, approximately.</h2>

Step-by-step explanation:

In the image attached you can observe a representation of the problem.

We have to find the distance between points A and B, which have coordinates (6,0) and (0,6), respectively.

The definition of distance between to given points is

d=\sqrt{(y_{2} -y_{1} )^{2} +(x_{2} -x_{1})^{2} }

Using points A and B, the distance between is

d_{AB}=\sqrt{(6-0)^{2} +(0-6)^{2} }  =\sqrt{36+36}=\sqrt{72} \\ d_{AB} \approx 8.5

Therefore, the distance between points A and B is 8.5 units, approximately.

8 0
4 years ago
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