3 years ago

On a quiz there are four multiple-choice questions worth 3 points each and two true/talse questions

Mathematics

1 answer:

Alex_Xolod [135]3 years ago

5 0

I need this answer too can someone please help us out with this one !!

Explanation : please

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In a survey of 1008 adults, a polling agency asked, "When you retire, do you think you will have enough money to live comfort

Olin [163]

Answer:

[0.4979, 0.5479]

Step-by-step explanation:

-We first determine the sample proportion:

$\hat p=\frac{x}{n}\\\\=\frac{528}{1008}\\\\=0.5238$

-The confidence intervals of a sample proportion is calculated using the formula:

$CI=\hat p\pm z\sqrt{\frac{\hat p(1-\hat p}{n}}$

#We substitute for the sample proportion and z value to get the Confidence interval:

$CI=\hat p\pm z\sqrt{\frac{\hat p(1-\hat p}{n}}\\\\=0.5238\pm 1.645\times \sqrt{\frac{0.5238\times0.4762}{1008}}\\\\=0.5238\pm0.0259\\\\=[0.4979,0.5497]$

Hence, the 90% confidence intervals is [0.4979,0.5479]

7 0

3 years ago

<img src="https://tex.z-dn.net/?f=2%20%5Ctimes%202" id="TexFormula1" title="2 \times 2" alt="2 \times 2" align="absmiddle" class

Ganezh [65]

Answer:

Step-by-step explanation:

3 0

4 years ago

Read 2 more answers

In figure shown below, the length of ac is 45 meters. what is the length in meters of bc

alexandr1967 [171]

BC is 21 meters.

2x + 5 + 3x = 45
5x + 5 = 45
5x = 40
X = 8

2(8) + 5 = BC
21 = BC

4 0

4 years ago

If -11 + N = -11, then N is the

stepladder [879]

Answer:

Step-by-step explanation:

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8 0

2 years ago

If y=(x+3) 2 then (-2x -6) 2 must equal

aleksandrvk [35]

y(x+3)2 then (-2x-6)2

is you have to distribute 2 like

2x+6=-4x-12

-2x -2x

6=-2x-12

+12 +12

-2x=0

x=0

3 0

3 years ago