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Tems11 [23]
3 years ago
9

An article in an educational journal discussing a non-conventional high school reading program reports a 95% confidence interval

of (520 , 560) for the average score on the reading portion of the SAT. The study was based on a random sample of 20 students and it was assumed that SAT scores would be approximately normally distributed. Determine the margin of error associated with this confidence interval.
Mathematics
1 answer:
Maksim231197 [3]3 years ago
6 0

Answer:

The margin of error associated with this confidence interval is 20

Step-by-step explanation:

A confidence interval has two bounds, a lower bound and an upper bound. The interval is symmetric, which means that the margin of error is the difference between these two bounds(upper - lower), divided by 2.

In this problem, we have that:

Lower bound: 520

Upper bound: 560

Determine the margin of error associated with this confidence interval.

(560 - 520)/2 = 20

The margin of error associated with this confidence interval is 20

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7 0
3 years ago
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Topic: Labor Economics. <br><br> Need solution for tasks 4 4.1 4.2 4.3
egoroff_w [7]

The curves of the labor market are illustrations of demand and supply, and the curves are all linear functions

<h3>4.1: The graph of the curves of the labor market</h3>

The equations are given as:

D = 36 - 2W

S₁ = 9 + W ---- domestic (i.e. without immigrants)

S₂ = 10 + 2W ---- total (i.e. including immigrants)

See attachment for the graph

<h3>4.2: The equilibrium wage rate before immigration</h3>

This is the point of intersection between the curves of S₁ and D.

From the graph, we have:

(W, D) = (9,18)

Hence, the equilibrium wage rate before immigration is $9, and the number of workers that would be hired is 18

<h3>4.3: The equilibrium wage rate after immigration</h3>

This is the point of intersection between the curves of S₂ and D.

From the graph, we have:

(W, D) = (6.5,23)

Hence, the equilibrium wage rate after immigration is $6.5, and the number of workers that would be hired is 23

<h3>4.3.1: Number of domestic workers hired</h3>

Substitute 6.5 for W in S₁ = 9 + W

S₁ = 9 + 6.5

S₁ = 15.5

Remove decimal

S₁ = 16

Hence, the number of domestic workers that would be hired is 16

<h3>4.3.1: Number of immigrants hired</h3>

Substitute 6.5 for W in S₂ = 10 + 2W

S₂ = 10 + 2 * 6.5

S₂ = 23

Subtract S₁ = 16 from S₂ = 23

Immigrants = 23 - 16

Immigrants = 7

Hence, the number of immigrants that would be hired is 7

Read more about demand and supply at:

brainly.com/question/4804206

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3 0
3 years ago
Angle 1 measure 75 degree what is its complement
dalvyx [7]
I think it’s 76 because I added it that’s a way i solved it but you can also multiple it by 1 and it will give the the same answer
3 0
3 years ago
4(p+q) /p-q x q+p/8(p+q)<br><br>​
Kay [80]

Answer:

\frac{q+p}{2(p-q)}

Step-by-step explanation:

\frac{4(p+q)}{p-q} *\frac{q+p}{8(p+q)}

We will cancel out like terms.

\frac{4}{p-q} *\frac{q+p}{8}\\=\frac{4(q+p)}{8(p-q)} \\=\frac{q+p}{2(p-q)}

4 0
2 years ago
2.57 mi/hr= how many m/min? Simplify your answer, round to the nearest tenth. Thanks.
sweet [91]

Answer is <u>68.9 m/min.</u>

<h3>Step-by-step explanation :-</h3>

Let's convert the units. To do this, we need to cancel the original units to get the units we want. We achieve this the following way :-

2.57 \frac{mi}{hr} \times \frac{1069.34 \: m}{1 \: mi} \times  \frac{1 \: hr}{60 \: min}

=>68.9 \:  \frac{m}{min}

Therefore, 2.57 mi/hr is the same as <u>68.9 m/</u><u>min</u> .

✍️ <em>By </em><em>Benjemin</em> ☺️

6 0
2 years ago
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