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
Lorico [155]
3 years ago
14

A research firm supplies manufacturers with estimates of the sales of their products from samples of stores. Marketing managers

often look at the sales estimates and ignore sampling error. An SRS of 50 stores this month shows mean sales of 41 units of a particular appliance with a standard deviation of 11 units. During the same month last year, an SRS of 52 stores gave mean sales of 38 units of the same appliances with a standard deviation of 13 units. An increase from 38 to 41 is a rise of 7.9 % . The marketing manager is happy because sales are up 7.9 % . (a) Give a 95 % confidence interval for the difference in mean number of units of the appliance sold at all retail stores. (Enter your answer rounded to three decimal places.)
Mathematics
1 answer:
Alchen [17]3 years ago
4 0

Answer:

lower interval = -1.715

upper interval = 7.715

Step-by-step explanation:

You might be interested in
0.2(-4–2.5b–7c). write the product
Xelga [282]

Answer:

-0.8 - 0.5b - 1.4c

Step-by-step explanation:

Take the b and the c away

Then times the 0.2 by all the numbers but don't add them

Once your done you and the b and c back to you equation

4 0
2 years ago
Can somebody tell me how to solve these kind of problems?
Ugo [173]

Answer: 918km^2

Step-by-step explanation:

area(a): 1700km^2\\percentage(p): 5.75 = \frac{5.75}{100}=0.0575\\years(y): 8

Let x be the new dimension of the area;

x=a-(a*p*y)

x=(1700km^2)-(1700km^2*0.0575*8)\\x=1700km^2-782km^2\\x=918km^2

6 0
3 years ago
In need help with the answer
gayaneshka [121]

Answer:

2

Step-by-step explanation:

there is 2:   3<u>  1  </u>

                      4

3 0
2 years ago
What does nine fifths equal
Dvinal [7]
Nine fifths is equalized to 1.8
5 0
3 years ago
Read 2 more answers
Use the premises and conclusion to answer the question.
Free_Kalibri [48]
I think it’s C, correct me if I’m mistaken.
5 0
3 years ago
Other questions:
  • Q ##10 please I need help with this
    15·1 answer
  • What is 62.5 percent of 24
    9·2 answers
  • A shipment of 288 reams of paper was delivered. Each of the 30 classrooms recieved an equal share of equipment paper. Any extra
    13·1 answer
  • A savings account was opened and not touched for 4
    13·1 answer
  • Math!!!! Fined the area of the triangle
    9·1 answer
  • I need help with this ASAP plz!!!!! Can you explain so I can understand it better?
    8·2 answers
  • My car gets 34 miles per gallon at 60 miles per hour. Is the number of miles I can drive at 60 miles per hour a linear function
    13·1 answer
  • What is the domain of the square root function graphed below?
    15·1 answer
  • Let s represent the number of games a baseball fan attends. Enter an
    7·1 answer
  • Why is it called numerator and denominator?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!