3 years ago

34 down, 16 left to go!

Mathematics

1 answer:

Kazeer [188]3 years ago

6 0

I would say that B. is the right answer.

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

sasho [114]

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

4 0

2 years ago

15x+3x+19= -17 please help me find this answer

masha68 [24]

Answer:

${ \rm{15x + 3x + 19 = - 17}} \\ \\ { \rm{18x + 19 = - 17}} \\ \\ { \rm{18x = - 17 - 19}} \\ \\ { \rm{18x = - 36}} \\ \\ { \boxed{ \rm{x = - 2}}}$