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
Mice21 [21]
3 years ago
7

A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standa

rd deviation were calculated. Based on the results, the exam creator claims that on the same exam, nine times out of ten, seniors will have an average score within 6% of 80%.
Is the confidence interval at 90%, 95%, or 99%?
What is the margin of error?
Calculate the confidence interval and explain what it means in terms of the situation.
Mathematics
2 answers:
Radda [10]3 years ago
3 0
So the fisrt thing we need to calculate is that 9 times out of 10 is 90% which will be the confidence interval. 
<span>Margin of error is 6% = .06 </span>
<span>Confidence interval is 80 +/- .06 = .74 to .86. or 74% to 86$ </span>
<span>In 9 times out of 10 the confidence interval for similar samples of seniors will contain the </span><span>true mean of the population of senior scores. </span>
White raven [17]3 years ago
3 0

Answer:

Margin of error: 6%; Confidence Interval Percentage: 90%; Confidence Interval: 74% and 86%

Step-by-step explanation:

Margin of error: 6%  --- This is already given in the question.  

Confidence interval is at 90%. 9/10=.90

The exam creator is saying that they are 90% confident that the seniors test scores will be between 74% and 86%.

0.8 - 0.06 = 0.74

0.8 + 0.06 = 0.86

The confidence interval is (0.74, 0.86)

You might be interested in
PLEASE HELP <br><br> Solve using linear combination 8x + y = 14 3x + y = 4
yKpoI14uk [10]

Answer:

The solution of the linear system is:

x = 2 and y = -2

Step-by-step explanation:

The following linear equation is solved as follows:

8\cdot x  + y = 14

3\cdot x + y = 4

After some algebraic manipulation:

y = 14 - 8\cdot x

y = 4 - 3\cdot x

14 - 8\cdot x = 4 - 3\cdot x

10 = 5\cdot x

5\cdot x = 10

x = 2

And finally,

y = 4 - 3\cdot (2)

y = -2

The solution of the linear system is:

x = 2 and y = -2

3 0
3 years ago
Read 2 more answers
Jay is paid $12.50 per hour. Last week, his paycheck totaled $112.50. How many hours did he work? Write and solve an equation to
olga2289 [7]

Answer:

9 hours

Step-by-step explanation:

If he earns 12.50 an hour...

112.50 ÷ 12.50 = 9 hours

5 0
3 years ago
Read 2 more answers
2. (01.02 MC)
Deffense [45]

Bisecting a line segment or an angle segment would divide the line (or the angle) into equal segments

<h3>The similarities in their constructions</h3>

The similarity in the constructions is that, both constructions are bisections, and they are meant to divide the segments into equal sectors

<h3>The differences in their constructions</h3>

The differences in the constructions is that, Anton's construction step would bisect a line, while Maxim's construction step would bisect an angle

Read more about bisection at:

brainly.com/question/14366932

4 0
3 years ago
TRIG PROOF! This was a bit tricky and has a huge weightage in my grade did i do it correctly
Eduardwww [97]

you r correctoooo

gooooood luckkkkkkkkkkkkkkkkk

have a good daeee homieeeee

8 0
3 years ago
Read 2 more answers
How do i make these ratios equal??
MakcuM [25]
There are still other ways to make<span> the same comparison, by using </span>equal ratios<span>. To find an </span>equal ratio<span>, you can either multiply or divide each term in the </span>ratio<span> by the same number (but not zero). For example, if we divide both terms in the </span>ratio<span> 3:6 by the number three, then we </span>get<span> the </span>equal ratio<span>, 1:2.</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • How do I do (m^4+3m^3-26m^2-2m-24)÷(m-4) ?(please show work)
    14·1 answer
  • What is SIN A?
    7·1 answer
  • What is 30,000 expressed in scientific notation?
    15·2 answers
  • 15. A mosquito flaps its wings 800 vibrations per second. What is the frequency of the buzz?
    15·1 answer
  • What is the square root of 78
    8·2 answers
  • Suppose that y varies inversely with x. Write a function that models the inverse function. x = 15 when y = 2.
    9·1 answer
  • How do I answer 9 and 10. (With a picture). Thanks!
    6·1 answer
  • I hate steven universe but Do-re-mi-fa-so-la-ti-do
    9·2 answers
  • Find the perimeter of the triangle.​
    9·1 answer
  • Plz help me pls
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!