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2 years ago

Can someone help me with the attached problem it’s for geometry, it’s urgent!

Mathematics

1 answer:

Sedaia [141]2 years ago

7 0

I am sorry but I cannot see the picture properly, can you add another photo? Sorry for the inconvenience.

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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).

8 0

2 years ago

Solve for all values of x by factoring. x^2+3x+8=-3x+3

docker41 [41]

Answer:

x = -1,-5

Step-by-step explanation:

X^2 + 3x + 5 = -3x

x^2 + 6x + 5 = 0

(x + 5)(x + 1) = 0

x = -1,-5

6 0

2 years ago

miracle did 1/6 of her homework in class. She did 1/6 on the bus. She did 3/6 at home. How much of her homework does she have le

sergij07 [2.7K]

It is not reasonable that she has 1/2 of her homework to do. She did 3/6 (1/2) at home. She actually has 1/6 of her homework left to do.

8 0

2 years ago

Drag a number to each box to complete the product. Numbers may be used more than once. 0.4764.7647.64764,760 Equation Product 47

ryzh [129]

Answer:could you maybe simplify the question

Step-by-step explanation:

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2 years ago

Please help i’m so confused

Viktor [21]

Answer:−x+6

Step-by-step explanation:

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1 year ago