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WARRIOR [948]
4 years ago
13

An electrical engineer wishes to compare the mean lifetimes of two types of transistors in an application involving high-tempera

ture performance. A sample of 60 transistors of type A were tested and were found to have a mean lifetime of 1827 hours and a standard deviation of 176 hours. A sample of 180 transistors of type B were tested and were found to have a mean lifetime of 1658 hours and a standard deviation of 246 hours. Let μX represent the population mean for transistors of type A and μY represent the population mean for transistors of type B. Find a 95% confidence interval for the difference μX−μY . Round the answers to three decimal places.
Mathematics
1 answer:
Verizon [17]4 years ago
7 0

Answer:

add the decimals thats all

Step-by-step explanation:

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90 is 120% of what number?
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Alvarez has $650 deposited into his bank account. The account earns simple interest of 5. 5% per year. No other money is added o
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Answer:

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Step-by-step explanation:

The amount of money in an account earning simple interest is given by the formula ...

  A = P(1 +rt)

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2 years ago
From the top of the Eiffel Tower, a jogger is spotted heading toward the tower. When at position A, the angle of depression of t
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325 meters if using full height of 324 meters for tower 
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When the depression is 37 degrees, you can create a right triangle with the angles 90, 37, and 53 degrees. The distance from a point directly underneath the observer will be:
 h/tan(37)
 where
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 And when the depression is 72 degrees, the distance will be:
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Step-by-step explanation:

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