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Alexxandr [17]
3 years ago
13

A. what is the height of the diving board

Mathematics
1 answer:
anzhelika [568]3 years ago
6 0
The answer is B because you have to find f(x) which is the height of the diver & that's what you would need to find out
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Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with mea
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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

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.

Applying z-score formula,

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

The value of x is given by,

x=(z\times \sigma)+\mu

Substitute the values,

x=(-1.28\times 0.78)+4

x=-0.9984+4

x=3.0016

So, approx 3 years.

Therefore, About 3 years Speedy Jet printers be guaranteed.

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3 years ago
Please help !!<br> idk math
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