1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pishuonlain [190]
2 years ago
10

a research company polled a random sample of 799 US teens about internet use. 49% of those teens reported that they had misrepre

sented their age online to gain access to websites and online services. The 95% confidence interval for this number is from 45.6% to 52.5%. Interpret the interval in this contexct. choose the best answer. A. there is a 95% chance that, if one were to ask all teens whether they had misrepresented their age online, 49% of them would say they have. B. there is a 95% chance that if one were to ask all the teens whether they had misrepresented their age online 49% would say they have. C. One is 95% cofident that of the 799 teens polled between 45.6% and 52.5% of them said that they had misrepresented their age online. D. one is 95% cofident that if one were to ask all teens whether they had misrepsresented their age online between 45.6% and 52.5% of them would say they have.
Mathematics
1 answer:
olasank [31]2 years ago
8 0

Answer: One is​ 95% confident​ that, if one were to ask all teens whether they had misrepresented their age​ online, between​ 45.6% and​ 52.5% of them would say they have.

Step-by-step explanation:

A 95% confidence interval interprets that a person is 95% sure that the true population proportion lies in it.

Given : A research company polled a random sample of 799 US teens about internet use.

49% of those teens reported that they had misrepresented their age online to gain access to websites and online services.

The 95% confidence interval for this number is from 45.6% to 52.5%.

i.e. A per son can be 95% sure that the  true proportion of all teens who admit to misrepresenting their age online is between​ 45.6% and​ 52.5%.

Correct interpretation of interval :  

One is​ 95% confident​ that, if one were to ask all teens whether they had misrepresented their age​ online, between​ 45.6% and​ 52.5% of them would say they have.

You might be interested in
Vugfybj Bukhara Hii diss did deism ska she did she dke end skip and sjj?
Aleks04 [339]

Answer:

4

Step-by-step explanation:

The answer is 4

4 0
2 years ago
Read 2 more answers
Given tan theta =9, use trigonometric identities to find the exact value of each of the following:_______
Ludmilka [50]

Answer:

(a)\ \sec^2(\theta) = 82

(b)\ \cot(\theta) = \frac{1}{9}

(c)\ \cot(\frac{\pi}{2} - \theta) = 9

(d)\ \csc^2(\theta) = \frac{82}{81}

Step-by-step explanation:

Given

\tan(\theta) = 9

Required

Solve (a) to (d)

Using tan formula, we have:

\tan(\theta) = \frac{Opposite}{Adjacent}

This gives:

\frac{Opposite}{Adjacent} = 9

Rewrite as:

\frac{Opposite}{Adjacent} = \frac{9}{1}

Using a unit ratio;

Opposite = 9; Adjacent = 1

Using Pythagoras theorem, we have:

Hypotenuse^2 = Opposite^2 + Adjacent^2

Hypotenuse^2 = 9^2 + 1^2

Hypotenuse^2 = 81 + 1

Hypotenuse^2 = 82

Take square roots of both sides

Hypotenuse =\sqrt{82}

So, we have:

Opposite = 9; Adjacent = 1

Hypotenuse =\sqrt{82}

Solving (a):

\sec^2(\theta)

This is calculated as:

\sec^2(\theta) = (\sec(\theta))^2

\sec^2(\theta) = (\frac{1}{\cos(\theta)})^2

Where:

\cos(\theta) = \frac{Adjacent}{Hypotenuse}

\cos(\theta) = \frac{1}{\sqrt{82}}

So:

\sec^2(\theta) = (\frac{1}{\cos(\theta)})^2

\sec^2(\theta) = (\frac{1}{\frac{1}{\sqrt{82}}})^2

\sec^2(\theta) = (\sqrt{82})^2

\sec^2(\theta) = 82

Solving (b):

\cot(\theta)

This is calculated as:

\cot(\theta) = \frac{1}{\tan(\theta)}

Where:

\tan(\theta) = 9 ---- given

So:

\cot(\theta) = \frac{1}{\tan(\theta)}

\cot(\theta) = \frac{1}{9}

Solving (c):

\cot(\frac{\pi}{2} - \theta)

In trigonometry:

\cot(\frac{\pi}{2} - \theta) = \tan(\theta)

Hence:

\cot(\frac{\pi}{2} - \theta) = 9

Solving (d):

\csc^2(\theta)

This is calculated as:

\csc^2(\theta) = (\csc(\theta))^2

\csc^2(\theta) = (\frac{1}{\sin(\theta)})^2

Where:

\sin(\theta) = \frac{Opposite}{Hypotenuse}

\sin(\theta) = \frac{9}{\sqrt{82}}

So:

\csc^2(\theta) = (\frac{1}{\frac{9}{\sqrt{82}}})^2

\csc^2(\theta) = (\frac{\sqrt{82}}{9})^2

\csc^2(\theta) = \frac{82}{81}

4 0
3 years ago
Please solve this don’t say you can’t see it if you see it answer please only if you know the answer
Mars2501 [29]

Answer:

5) 3 units

6) 9 units

7) 15.5

8) 67

8 0
3 years ago
Classify the following triangle
maks197457 [2]

Answer:

Isosceles and obtuse

Step-by-step explanation:

It is not a scalene triangle because it has two same lengths 41 degrees and 41 degrees.

<u>It is a </u>Isosceles triangle because two of the sides have the same lengths 41 degrees and 41 degrees

<u>It is an</u> obtuse triangle because it has on obtuse angle which is 98 and two acute angles that are 41 degrees

It is not an equilateral because not all of the sides are the same lengths

It is not a right triangle because there are 90 degree angles

It is not an acute triangle because not all the angles are acute angles

4 0
3 years ago
Read 2 more answers
If 13 - 3z= 15z +4, z = ?
jasenka [17]

Answer:

z = 1/2 or 0.5

Step-by-step explanation:

13 - 3z = 15z + 4

   +3z    +3z

  13 = 18z + 4

  -4            -4  

      9 = 18z

      z = 9/18

      z = 1/2 or 0.5

3 0
2 years ago
Other questions:
  • How do you find the midpoint M?
    8·2 answers
  • Jake packed 3 pairs of shorts for a trip: 1 khaki and 2 denim. He
    13·2 answers
  • HELP ASAP!! Use cross products to determine which are valid proportions.
    7·1 answer
  • What is the slope of the line represented by the equation <br> 3<br> x<br> +<br> 4<br> y<br> =8
    15·1 answer
  • Solve for u: 2(u + 6) - 8 &gt; 3(u - 5)
    11·2 answers
  • Which expression is equivalent to 4(u+11w)<br> ? PLZ I need this
    8·1 answer
  • Which of the following pairs shows triangles that are similar but not congruent?
    10·1 answer
  • T=r/r-3<br> make r the subject of the formula
    6·1 answer
  • Convert 1/3 to a percent
    10·2 answers
  • Complete the steps, which describe how to find the area of the shaded portion of the circle. 1. Find the area of the sector by m
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!