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3 years ago

Question What is the answer

Mathematics

1 answer:

grigory [225]3 years ago

5 0

Answer:

0.0228, Hope that useful for you.

Step-by-step explanation:

Because of " the scores...normally distributed of a mean 310 and the standard deviation 12", we can use the Central limit theorem.

That means:

( $P(X>334)= P(\frac{X-E(X)}{SD(X)}>\frac{334-310}{12})= P(Z>2)= 1-P(Z\leq 2)= \\1- 0.9772= 0.0228$

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Sidana [21]

C.6

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Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with mea

Anika [276]

Answer:

About 3 years Speedy Jet printers be guaranteed.

Step-by-step explanation:

Given : Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with

mean $\mu = 4$ and standard deviation $\sigma = 0.78$

If the company wishes to replace no more than 10% of the printers.

To find : How long should Speedy Jet printers be guaranteed ?

Solution :

Using Z- table,

Z value corresponding to 10% or 0.10 = -1.28.

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So, approx 3 years.

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3 years ago

What percentage of 128 is 96?

katrin [286]

So, since 100% = 128, x should equal 96, and we are trying to find x.
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Cancel out the x's on the left side so
100 = 1.333(x)
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Dmitry [639]

Answer:

Step-by-step explanation:

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2 years ago

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torisob [31]

Answer:

Step-by-step explanation:

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