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]
4 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]4 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
What are the numbers called in a multiplication
mart [117]
The numbers that are called in multiplication are called factors. Multiplying factors together will create a product.
3 0
4 years ago
Read 2 more answers
Pythagorean theorem
Talja [164]

Answer:

b=20 yards

Step-by-step explanation:

15^2+x^2=25^2

225+x^2=625

x^2=400

x=20

5 0
3 years ago
The prefix dodeca-means what? Check all that apply.<br><br> A-8<br> B-6<br> C-20<br> D-12
Firdavs [7]

Answer:

The prefix dodeca- means 12. I hope this helped! :-)

3 0
4 years ago
Read 2 more answers
( 8 x 10^-3 ) * (0.0002) = ?<br><br> In scientific notation please
Juliette [100K]
 1.6 × 10 to the negative sixth power "10 -6". 
3 0
3 years ago
circle centered at the origin has a radius of 5 units. The terminal side of an angle, θ, intercepts the circle in Quadrant IV at
astraxan [27]

Answer:

Step-by-step explanation:

x²+y² = 5²

3²+y² = 25

y² = 16

y = ±√16 = ±4

Since the terminal side is  in quadrant IV, y = -4

sinθ = -4/5

5 0
3 years ago
Other questions:
  • 6_(3_1)_5_1=17<br><br>How to get 17?
    6·1 answer
  • solve the formula for calculating the perimeter of a parallelogram with sides b and c for c p = 2b+2c
    12·2 answers
  • Joey works 20 hours a week. If he works for 10 months continually, how many hours will he have worked? (1 month = 4 weeks)
    15·1 answer
  • Write 7x7x7 usiang a exponent
    10·2 answers
  • Rowena is proving that AD ≅ EB. Which statement does the ♣ represent in her proof?
    12·2 answers
  • What is the geometric mean?
    6·2 answers
  • Plsss helpppp I’m stuck
    11·2 answers
  • HELP!! VERY TIME TIME SENSITIVE
    14·1 answer
  • |-5c+5|=40 solve for c
    11·2 answers
  • I don't understand this question 5,925,020 = 5,000,000 + ------ + 20,000 ----- + 2O
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!