3 years ago

Answer it plssss........

Mathematics

1 answer:

AleksandrR [38]3 years ago

4 0

Answer:

Step-by-step explanation:

Because x has the degree one and it’s figure at the numerator

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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

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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.

Applying z-score formula,

$z=\frac{x-\mu}{\sigma}$

The value of x is given by,

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Substitute the values,

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