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3 years ago

What number is exactly halfway between 1000 and 1500?

2 answers:

5 0

The number between both of them is 1250
1. Add 1000+1500=2500
2.Divide it by 2
3.That equals your answer which is 1250

Lunna [17]3 years ago

3 0

$the \ number \to \frac{1000+1500}{2}=\frac{2500}{2}\to\boxed{\boxed{1250}}$

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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:

The 90% confidence interval for the population standard deviation is calculated as:

$\sqrt{\frac{(n-1)*s^{2} }{X^2_{\alpha/2 } } }$ < 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 < $\sqrt{\frac{(51-1)*2.34^{2} }{34.76} } }$

2.01 < σ < 2.81

5 0

3 years ago

The distance between two locations on a map is 4 1/8 inches. if the map scale is 2 inches = 40 miles, what is the actual distanc

HACTEHA [7]

83 miles is about the correct answer

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3 years ago

N/4 + 12 =18 i will give brainllest

Hoochie [10]

Answer:

n = 24

Step-by-step explanation:

subtract 12

n/4 = 6

multiply by 4

n = 24

7 0

3 years ago

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Write the word sentence as an equation. Then solve.

Ainat [17]

Answer:

Solution: X=144

Equation: x/(-9)= -16

Step-by-step explanation:

the / is divide

the first part of the word problem states that a number x is being divided by -9, x/-9 then it states that this equation equals -16 therefore,x/-9=-16.

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3 years ago

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Can someone help with this problem?

quester [9]

Answer:

0.3

Step-by-step explanation:

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3 years ago