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
Angelina_Jolie [31]
3 years ago
5

The makers of a soft drink want to identify the average age of its consumers. A sample of 25 consumers was taken. The average ag

e in the sample was 31 years with a standard deviation of 3.8 years.The Margin of error of the 99% confidence interval for the average age of the consumers is a.1.90 years b.2.13 years c.4.10 years d.1.65 years
Mathematics
1 answer:
Lelu [443]3 years ago
8 0

Answer:

a.1.90 years

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this question:

n = 25, \sigma = 3.8

So

M = 2.575*\frac{3.8}{\sqrt{25}} = 1.90

So the correct answer is:

a.1.90 years

You might be interested in
Every plant bloomed in the spring. The simple subject of this sentence is _____.
Bezzdna [24]
Plant
a simple subject is a person, place or thing
6 0
3 years ago
ILL GIVE BRAINLIEST 5y= x + 6 solve
Ad libitum [116K]

Answer:

it's x - 5y = -6

hope it helps

8 0
3 years ago
Algebra 2<br><br> Solve each equation to the nearest thousand <br><br> Help pls
borishaifa [10]
I don’t understand your question, can you give more details please
5 0
3 years ago
I'm not good at math so Imma leave this here :))
Elodia [21]

Answer:

1. a/2b 2. 5/6 3. x-1/2 4. y-5/y+5 5. x+5/x-1

Step-by-step explanation:

5 0
3 years ago
3 questions pls help
3241004551 [841]

12. I need the graphs to answer it

11. y = 1/2x - 1

10. The first graph is the best

4 0
3 years ago
Other questions:
  • A student's cell phone plan has a monthly charge of $40 for 600 minutes of use and a $0.25/minute charge for each additional min
    13·1 answer
  • I need help with everything
    12·1 answer
  • How do you know if vertices make a right triangle?
    10·1 answer
  • Find the class boundaries.
    12·1 answer
  • Least common multiple of 10 , 5 ,3
    13·1 answer
  • Write an addition expression and a subtraction expression each with a value of 2.4 x 10^-3
    6·1 answer
  • What is the missing side length in this right triangle? A. 15 B. 21 C. 225 D. 441
    8·1 answer
  • 10. What is the missing statement in the proof?
    5·1 answer
  • Find the value of x.
    7·1 answer
  • Which expression is equilvalent to (5g-2h)-(3h+8-4g).
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!