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bija089 [108]
1 year ago
10

MATH QUESTION HELP. Hhhhnh

Mathematics
1 answer:
maksim [4K]1 year ago
3 0

Answer:

y

Step-by-step explanation:

that easy just isolate the variables

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The thickness of eight pads designed for use in aircraft engine mounts are measured. The results, in mm, are 41.8, 40.9, 42.1, 4
nika2105 [10]

Answer:

We accept H₀ we don´t have enough evidence to support that the mean thickness is greater than 41 mm

Step-by-step explanation:

Sample Information:

Results:

41.8

40.9

42.1

41.2

40.5

41.1

42.6

40.6

From the table we get:

sample mean :  x  =  41.35

sample standard deviation    s = 0.698

Hypothesis Test:

Null Hypothesis                    H₀                x = 41

Alternative Hypothesis        Hₐ                x > 41

The test is a one-tail test

If significance level is  0.01 and n = 8  we need to use t-student distribution

From t-table  α = 0.01  and degree of freedom  df = n - 1  df = 8 - 1

df = 7    t(c) = 2.998

To calculate t(s)  =  (  x  -  41 ) / s/√n

t(s)  =  (  41.35  -  41 ) / 0.698/√8

t(s)  = 0.35 * 2.83/ 0.698

t(s) = 1.419

Comparing   t(s)  and t(c)

t(s) < t(c)

t(s) is in the acceptance region we accept H₀

7 0
3 years ago
Solve for z<br> THANK U SM<br> I WILL MARK BRAINILIEST
Anit [1.1K]

Answer:

z=7

Step-by-step explanation:

Combine like terms: 2z=14

Reduce the greatest common factor on both sides of the equation z=7

answer: z= 7

3 0
2 years ago
Read 2 more answers
1 4/11 divided by 1/11
s344n2d4d5 [400]

Answer:

15

Step-by-step explanation:

hope this helps

4 0
3 years ago
The heights of Karina, Miya and Clint were 155cm, 158cm, and 161cm respectively. What is the height of Roger if the mean of all
Gnesinka [82]

Answer:

refrase the question

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please help quick!!!​
hodyreva [135]

Answer:

I wanna say 35 \cm

Step-by-step explanation:

6 0
3 years ago
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