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masha68 [24]
3 years ago
5

Si el gerente de control de calidad desea estimar la media de vida de lámparas con 20 horas, con un nivel de confianza del 95% y

se supone un error de 10%. ¿Cuál es el tamaño de la muestra?
Mathematics
1 answer:
vfiekz [6]3 years ago
6 0

English translation:

If the quality control manager wants to estimate the average life of lamps with 20 hours, with a confidence level of 95% and an error of 10% is assumed. What is the sample size?

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Natasha_Volkova [10]

Answer:

To find the perimeter, add together the lengths of the sides. Start at the top and work clockwise around the shape. Area of Polygon = (Area of A) + (Area of B) To find the area, divide the polygon into two separate, simpler regions.

Step-by-step explanation:

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3 years ago
the windows on a building are proportional to the size of the building. the height of each is 18in and the width is 11in if the
Elena-2011 [213]
You can set this up as 2 fractions equal to each other, like ratios.

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Cross multiply and you get 18x=1,188

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A and B are independent events. P(A) = 0.40 and P(B) = 0.20. What is<br> PA and B)?
solmaris [256]

Answer:

The value of P( A and B ) is 0.08.

Step-by-step explanation:

When two events are independent then the probability of both occurring is equal to the product of probabilities of both events individually,

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6 0
3 years ago
When using your portable radio, you must push the "press to talk" button and wait one second before speaking. This is essential
KengaRu [80]

Answer:

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This is essential to effective communication because your EMS system must use Repeaters.

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3 years ago
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jekas [21]

Answer:

Step-by-step explanation:

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Eliminating,

2x + 3y = 3        (1)

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------------------

      -9y =9

     ∴y=-1

eq. y in 1

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2x=3+3

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=3

Pls mark me brainliest

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