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Lemur [1.5K]
3 years ago
9

If I'm doing it wrong correct me please but can you finish the rest for me idk how to

Mathematics
1 answer:
nevsk [136]3 years ago
4 0
Sorry Im in 6th but i still have no idea......

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Results from previous studies showed 76% of all high school seniors from a certain city plan to attend college after graduation.
Degger [83]

Answer:

Yes, this indicate that the percentage has increased from that of previous studies.

Step-by-step explanation:

We are given that Results from previous studies showed 76% of all high school seniors from a certain city plan to attend college after graduation.

A random sample of 200 high school seniors from this city reveals that 162 plan to attend college.

<em>Let p = % of all high school seniors from a certain city who plan to attend college after graduation</em>

SO, <u>Null Hypothesis</u>, H_0 : p \leq 76%   {means that the percentage has not  increased from that of previous studies}

<u>Alternate Hypothesis,</u> H_a : p > 76%   {means that the percentage has increased from that of previous studies}

The test statistics that will be used here is <u>One-sample z proportion statistics</u>;

              T.S.  = \frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }  ~ N(0,1)

where,  \hat p = sample proportion of high school seniors from this city who  

                   plan to attend college = \frac{162}{200}  = 0.81

            n = sample of high school seniors = 200

So, <u><em>test statistics</em></u>  =  \frac{0.81-0.76}{{\sqrt{\frac{0.81(1-0.81)}{200} } } } }  

                               =  1.8025

<em>Now at 5% significance level, the z table gives critical value of 1.6449 for right-tailed test. Since our test statistics is more than the critical value of z so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region.</em>

Therefore, we conclude that the percentage has increased from that of previous studies.

4 0
2 years ago
Select the correct answer
sweet-ann [11.9K]

Answer:

hey you,the answer is 'B'

6 0
2 years ago
Find the value of x and the measure of the angel labeled 6x. A. X=5; angle measure is 42 B. X=5; angel measure is 72 C. X= 5; an
Sergeu [11.5K]

Answer:

x = 5

angle measure labelled 6x is 30degrees

Step-by-step explanation:

Find the diagram attached

from the diagram;

6x = 30 (vertically opposite angle)

Divide both sides by 6

6x/6 = 30/6

x = 5

Get the angle labelled 6x

6x = 6(5)

6x = 30degrees

4 0
2 years ago
Solve the equation<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7Bx%20-%206%7D%20%20%2B%202%20%3D%206" id="TexFormula1" title
tensa zangetsu [6.8K]

Explanation:

First you had to square from both sides of equation form.

(\sqrt{x-6+2})^2=6^2

Then you expanded form.

(\sqrt{x-6+2})^2=x-4

x-4=36

6^2=6*6=36

Solve by equation form.

x-4=36

Add by four from both sides of equation form.

x-4+4=36+4

Simplify.

x=40

Verified solutions.

x=40 \boxed{TRUE}

Final answer: \boxed{x=40}

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

-Charlie

7 0
2 years ago
What are the answers I have to put in the yellow boxes?
valentinak56 [21]

The expression 1x² + 14x + 40 is a quadratic expression, and the answers in the yellow boxes are 40 and 14

<h3>How to complete the boxes?</h3>

The quadratic expression is given as:

1x² + 14x + 40

This implies that:

a = 1

b = 14

c = 40

Because a quadratic expression is represented as:

ax² + bx + c

The expressions in the yellow boxes are:

a * c and b

So, we have:

a * c = 1 * 40 = 40

b = 14

Hence, the answers in the yellow boxes are 40 and 14

Read more about quadratic expressions at:

brainly.com/question/18797214

#SPJ1

4 0
1 year ago
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