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3 years ago

Evaluate |-6| + 2|-4| - 3|6|

1 answer:

7 0

|-6| + 2|-4| - 3|6|

get rid of the absolute values so it's

 6+ 2(4)- 3(6)

do PEMDAS

6+8-18

=-4

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The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e

marusya05 [52]

Answer:

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

$\hat p =\frac{955-812}{955}= 0.150$

$0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131$

$0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169$

And the 90% confidence interval would be given (0.131;0.169).

Step-by-step explanation:

We have the following info given:

$n= 955$ represent the sampel size slected

$x = 812$ number of students who read above the eighth grade level

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

$\hat p =\frac{955-812}{955}= 0.150$

The confidence interval for the proportion would be given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

For the 90% confidence interval the significance is $\alpha=1-0.9=0.1$ and $\alpha/2=0.05$ , with that value we can find the quantile required for the interval in the normal standard distribution and we got.

$z_{\alpha/2}=1.64$

And replacing into the confidence interval formula we got:

$0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131$

$0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169$

And the 90% confidence interval would be given (0.131;0.169).

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3 years ago

What is the height of the Tree? 2 m 3 m 30 m

lisabon 2012 [21]

Answer:

The height of the tree is 3m

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3 years ago

What is the rate of change for y=38x+20 A. 38 B. 20 C.1 D. it has no term

djverab [1.8K]

Answer:

Step-by-step explanation:

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3 years ago

Are 6 exponent 3 and -x exponent 3 alike

amid [387]

Answer:

Step-by-step explanation:

6^3 = 216

(-x)^3 = - x^3.

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3 years ago

Vicky made a recipe for 144 fluid ounces of scented candle wax how many one cup candle molds can she fill with the recipe

san4es73 [151]

Well,

1 cup= 8 oz.

If there is 144 ounces...'

Divide 8 into 144

144 divided by 8=

She can make 18 cups...

Hope this helps :)

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3 years ago