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
Sidana [21]
3 years ago
14

A random sample of 20 purchases showed the sample mean of $48.77 and the sample standard deviation s is $17.58. How large is the

margin of error for a 80 % confidence interval for the mean purchases of all customers
Mathematics
1 answer:
laila [671]3 years ago
3 0

Answer:

<h2>$5.03</h2>

Step-by-step explanation:

Given data          

Sample Mean (M):  $48.77  

Sample Size (n): 20

Standard Deviation (σ) :  $17.58

Confidence Level: 80%

 we know that z*-Values for 80% Confidence  Levels is 1.28

the expression for margin of error is given bellow\

MOE= z*σ/√n

We can now substitute into the expression and solve for the MOE as

MOE= 1.28*17.58/√20

MOE= 22.502/4.47

MOE= 22.502/4.47

MOE= 5.03

The margin of error for a 80 % confidence interval is $5.03

You might be interested in
Amir is solving the equation x2 + 8 +6=0 with the quadratic formula.
lapo4ka [179]

Answer:

A= -1, B = -8, C = -6

Step-by-step explanation:

7 0
2 years ago
Solve the system by substitution.<br> y = 7x – 20<br> y = 2x
g100num [7]

Answer:

x=4 y=8

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation

4 0
3 years ago
Hi can anyone help me with this please ​
kupik [55]

Answer:

sure

Step-by-step explanation:

she multiplied it 3 times, so, i dont think 8 should be negative.

6 0
2 years ago
Read 2 more answers
Use the graph of the function g to answer the following. use correct formatting for your work
netineya [11]

9514 1404 393

Answer:

  • f(-2) = 4
  • f(1) = -5
  • D: [-3, ∞)
  • R: [-5,  11]

Step-by-step explanation:

You have marked the points on the graph corresponding to ...

  f(-2) = 4

  f(1) = -5

__

The domain is the horizontal extent, from x = -3 to +∞.

The range is the vertical extent, from y = -5 to +11 (inclusive).

6 0
2 years ago
A relay race is a mile long and is run by 4-member teams. If each team member runs the same distance, what fraction of a mile do
Anna [14]
4 divided by 1 Ewqila
7 0
3 years ago
Read 2 more answers
Other questions:
  • -2(5-x)-15 is greater than 12(x+1)-10(x-3) w
    15·1 answer
  • What is the value of y in the equation: xy =k if x=12 and k=3
    9·1 answer
  • A Ferris wheel 50ft in diameter makes one revolution every
    15·1 answer
  • 4.
    6·1 answer
  • Please help I’m being timed!!! When planning road development, the road commission estimates the future population using the fun
    11·1 answer
  • Buffer stock is the level of stock ​
    15·2 answers
  • What is the value of the y-coordinate where this line crosses the y-axis? (7, 17) (3,9) ​
    15·2 answers
  • What is the greatest common factor (GCF) of the following monomials?
    10·1 answer
  • Yis inversely proportional tox.Wheny=50,x=4Work outywhenx=8
    6·1 answer
  • Please help!!!!!!!!!!!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!