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podryga [215]
3 years ago
15

Hey!!! Can anyone help me please!

Mathematics
1 answer:
kykrilka [37]3 years ago
6 0

Answer:

it will not change

Step-by-step explanation:

the outlier is 3

the mode is the most occuring value in the list which is 16 before and after the 3 is removed

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The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the
Feliz [49]

Answer:

a) σ  =  4933,64

b) CI 99%  = ( - 5746  ;  7194 )

c) No difference in brands

Step-by-step explanation:

Brand 1:

n₁   =  8

x₁   = 38222

s₁   = 4974

Brand 2:

n₂  = 8

x₂  = 37498

s₂  = 4893

As n₁  =  n₂  = 8       Small sample  we work with t -student table

degree of freedom      df  = n₁  +  n₂  - 2    df = 8 +8 -2  df = 14

CI = 99 %   CI  =  0,99

From  t-student table we find   t(c)  = 2,624

CI  =   (  x₁  -  x₂ ) ±  t(c) * √σ²/n₁   +  σ²/n₂

σ² = [( n₁  -  1 ) *s₁² +  ( n₂  -  1  ) * s₂² ] / n₁ +n₂ -2

σ² = 7* (4974)² + 7*( 4893)² / 14

σ² = 24340783       σ  =  4933,64

√ σ²/n₁  +  σ²/n₂     =  √ 24340783/8   +  24340783/8

√ σ²/n₁  +  σ²/n₂     =  2466

CI 99%  =  (  x₁  -  x₂ ) ± 2,624* 2466

CI 99%  =   724  ± 6470

CI 99%  = ( - 5746  ;  7194 )

As we can see CI 99% contains 0 and that means that there is not statistical difference between mean life of the two groups

3 0
3 years ago
If f(x) = x^2 - 4x + 3, and the domain is {-2, 0, 1}, what is the range?
dangina [55]

Evaluate the function at the three values of the range and see what you get. The appropriate choice is ...

... D) {15, 3, 0}

_____

Evaluation can sometimes be simpler if you rearrange the function to a form called "Horner's form."

... f(x) = (x -4)x +3

Then the evaluation looks like (for x=-2) ...

... f(-2) = (-2-4)(-2)+3 = (-6)(-2) +3 = 12 +3 = 15

This is sufficient to identify D as the answer of choice.

5 0
3 years ago
Study island question...need help...PLSSSS HELP MEHHHHHH!!! 1 pic included...
OlgaM077 [116]

Answer:

C

Step-by-step explanation:

Keep a consistent ratio of 4:2, and we need a total of 36 glasses of punch.

So if the ratio 4:2 is a total of 6, then we would need 6 times the amount because 6*6 is 36. So 4 and 2 * 6 or 6 (4+2) = 24+12. So the answer is C.

Hope this helps in some way.

4 0
3 years ago
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Hi i need helpppppppp
Juli2301 [7.4K]
The product is greater that 1

the exact answer is 27

Hope i helped
Good luck!!!!!
4 0
3 years ago
Jerome bought three T-shirts. The red one cost $7.97, the green one cost $11.49, and the black one cost $12.58. How much did the
sesenic [268]
32.04 would be the answer
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3 years ago
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