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2 years ago

If 65% of a number is 234 and 10% of the same number is 36, find 75% of that number

Mathematics

1 answer:

grigory [225]2 years ago

6 0

65%= 234

100%= 234÷65×100

100%= 360

75%= 360÷100×75

75%= 270

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Answer:

Step-by-step explanation:

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2 years ago

Find the 90% confidence interval for the population standard deviation given the following.

lions [1.4K]

Answer:

b. 2.01 < σ < 2.81

Step-by-step explanation:

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$\sqrt{\frac{(n-1)*s^{2} }{X^2_{\alpha/2 } } }$ < σ < $\sqrt{\frac{(n-1)*s^{2} }{X^2_{1-\alpha/2 } } }$

Where n is equal to 51, s is equal to 2.34, $\alpha$ is 10%, $X^{2} _{\alpha /2}$ is the value for the Chi squared distribution with n-1 degrees of freedom that has a probability of $\alpha /2$ in the right tail and $X^{2} _{1-\alpha /2}$ is the value for the Chi squared distribution with n-1 degrees of freedom that has a probability of $1-\alpha /2$ in the right tail.

So, replacing n by 51, s by 2.34, $X^{2} _{\alpha /2}$ by 67.50 and $X^{2} _{1-\alpha /2}$ by 34.76, we get that the The 90% confidence interval is equal to:

$\sqrt{\frac{(51-1)*2.34^{2} }{67.50} } }$ < σ < $\sqrt{\frac{(51-1)*2.34^{2} }{34.76} } }$

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3 years ago

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Answer:

Their would be 6

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Hope this helps have a great day

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3 years ago

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The attachment is above

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Step-by-step explanation:

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2 years ago

Read 2 more answers