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tigry1 [53]
3 years ago
12

Standard deviation of this data set round answer to the nearest tenth 11,16,22,28,29,30,31,34,37,38,43,49,56,78,99

Mathematics
1 answer:
Solnce55 [7]3 years ago
7 0

23.2

A.p.e.x

Hopethis helps

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Pls tell me which to pick (a,b,c,or d)
Elodia [21]

Answer:

B (Y, N, N)

Step-by-step explanation:

a) y = 1/3x, so each value satisfies it. This is true.

b) If "a" is "Y" then b has to be no

c) 1 * 11 = 11

2 * 2 = 22

3 * 5 = 15

The last equation does not follow the rules for the previous two equations, so it is no.

Thus, the answer is B (Y, N, N)

4 0
3 years ago
(1) A manufacturer of tires believes that their mean time to failure (MTTF) is 20 613 km. They also believe that time to failure
ELEN [110]

Answer:

a) The probability of falling in the warranty period is 11.6%.

b) The warranty period need to be 19771 km to ensure that no more than 5 per cent of tires fail in the warranty period.

Step-by-step explanation:

a) To fall within the warranty period, the tire has to fail before the 20,000 km.

To calculate the probability, we first calculate the z-value:

z=\frac{X-\mu}{\sigma}=\frac{20000-20613}{512}=  \frac{-613}{512}= -1.197

Then, the probability of falling in the warranty period is:

P(X

b) To calculate this we have to go on from a P(z<z₁)=0.05. This happens for z=-1.645.

This corresponds to a value X of:

X=\mu+z*\sigma=20613+(-1.645)*512=20613-842=19771

The warranty period need to be 19771 km to ensure that no more than 5 per cent of tires fail in the warranty period.

5 0
4 years ago
Please answer! <br> Solve for X
Sedbober [7]

Answer:

x = 3

Step-by-step explanation:

We can solve this by using ratios of similar triangles

3           x

------ = ------------

3+9           12

3           x

------ = ------------

12           12

x must equal 3 to keep the ratios the same

4 0
4 years ago
Read 2 more answers
Parallelogram ABCD ​ is a rectangle.
Ugo [173]
The correct answer is y = 11

because:
2y + 7 = 3y − 4
−y + 7 =−4

Subtract 7 from both sides.
−y + 7 − 7 = − 4 − 7
−y = −11

Divide both sides by -1.
y = 11
8 0
3 years ago
An airplane has a wingspan of 20 feet and a length of 15 feet. If the model of this airplane has a wingspan of 8 inches, what is
Katen [24]

Answer:

The length of the model is 6 inches.

Step-by-step explanation:

The wingspan of the airplane and length of the airplane are a ratio of 4:3

The model is also supposed to be 4:3.

4:3 x 2 = 8:6

Or, 20x12=240

240/8=30

15x12=180

180/30=6.

8 0
3 years ago
Read 2 more answers
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