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lys-0071 [83]
3 years ago
7

Before agreeing to purchase a large order of polyethylene sheaths for a particular type of high-pressure, oil-filled submarine p

ower cable, a company wants to see conclusive evidence that the population standard deviation of sheath thickness is less than .05 mm. What hypotheses should be tested, and why
Mathematics
1 answer:
sasho [114]3 years ago
4 0

Answer:

H0 : σ = 0.5

H0 : σ < 0.5

Step-by-step explanation:

From the scenario described above, the company wants to see conclusive evidence that the population standard deviation of sheath thickness is less than .05 mm ; THIS SIMPLY means ; REJECTION OF the NULL HYPOTHESIS. This is because once there is a significant or conclusive evidence in hypothesis testing, then we reject the null and support the claim of the alternative hypothesis.

Hence, the alternative hypothesis is ; population standard deviation of sheath Thickness is less than 0.5.

H1 : σ < 0.5 ;

Therefore, our null will be ;

H0 : σ = 0.5

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The sum of two integers is -129, if one of them is 150, find the order
Georgia [21]

Answer: -279

Step-by-step explanation:

-129-150= -279

to check

-279+150= -129

6 0
3 years ago
11900cm = yard(s)?<br> show work.
AnnZ [28]

Answer:

≈130.14 yards

Step-by-step explanation:

\:\:\:1\:cm\:\:\:\:\:\: =0.0109361\:yards\\11900\:cm = \:x\:yards

Cross Multiply

x = 11900\times 0.0109361\\\\x = 130.13959\\\\x = 130.14 \:yards

6 0
3 years ago
Which of the following describes the correct process for solving the equation 2x + 6 =22 and arrives at the correct solution
olga nikolaevna [1]

Answer:

Step-by-step explanation:

Starting with 2x+6=22

You subtract 6 from each side of the equation:

2x=16

You want to isolate the "x" so you divide each side by 2.

x = 8

check your answer: 2x + 6 = 22

2(8) + 6 = 22

16 + 6 = 22

3 0
3 years ago
A biology class examined some flowers in a local meadow. Out of the 40 flowers they saw, 8 were perennials. What percentage of t
Sladkaya [172]
So first we want to say, 8 out of the 40 flowers were perennials.

8 out of 40 is 8/40, or simplified down to 1/5.

1/5 in percentage form is 20% because 1 divided by 5 = 20%.
4 0
3 years ago
1675 at 4.6% for 4 years What is the balance
Yuri [45]
Amount of Interest (I) = P * R * T /100
I = 1675 * 4.6 * 4 /100
I = 308.20

Balance = Initial amount + Interest amount
B = 1675 + 308.20 = 1983.20

In short, Your Answer would be $1983.20

Hope this helps!
4 0
3 years ago
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