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
kifflom [539]
3 years ago
6

A set of piano prices distributed at a mean of 3000 and a standard deviation of 200 dollars. An electric piano has a price of 25

76 dollars. What proportion of piano prices are higher than the price of the electric piano?
Mathematics
1 answer:
lana [24]3 years ago
4 0

Answer:

The proportion of piano prices higher than the electric piano is 98.3%

Step-by-step explanation:

The first thing to do here is to calculate the standard score of the price of the electric piano given.

Mathematically, this is

z-score = (x-mean)/SD

where mean is 3000 and SD is 200, x is 2576

z-score = (2576-3000)/200 = -2.12

Now we proceed to calculate the probability of this z-score

The probability we are trying to calculate is

P( x > $2576) or simply P ( z > -2.12)

Using standard score probability calculator or table, we have

P(x>2576) = 1 - P(x<2576)

But, P(x<2576) = 0.017003

P(x>2576) = 1 - P(x<2576) = 0.983

This is same as 98.3%

You might be interested in
What is the value of y?
RUDIKE [14]

Answer:

C. 55

Step-by-step explanation:

Since all angles in a triangle add up to 180°, we have:

40 + y + y + 30 = 180

2y + 70 = 180

2y = 110

y = 55

7 0
3 years ago
Read 2 more answers
Pre-algebra<br> Pls help-
Anestetic [448]

Answer: 9

Step-by-step explanation: just devide then times

5 0
2 years ago
Read 2 more answers
Arrange these numbers from least to greatest
iogann1982 [59]
A. -3/7 = -0.4286
b. -5/6 = -0.8333
c. -3/5 = -0.6000
d. -7/9 = -0.7777
bdca is least to greatest

Correct answer is D.
4 0
3 years ago
Is the answer <br><br> A<br><br> B<br><br> C<br><br> D
ivann1987 [24]
I also think the answer is D, who else agrees with me? Btw, thank you for posting this question. I enjoy answering fun things sometimes.
5 0
3 years ago
Look at the photo pick A B C D either one explanation not needed thank you! &lt;3
Nezavi [6.7K]

Answer:

-1

This is because in negative the numbers the higher the number, the lower its value

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • I need help with this plz...Thanks
    11·1 answer
  • What is the scale factor from 5cm to 15m
    8·1 answer
  • How could you increase the mass of a wooden block?
    6·1 answer
  • Multiply
    5·1 answer
  • I need to find the value of x using the similarities of the triangle
    10·1 answer
  • A preliminary sample of holiday shoppers revealed that the standard deviation of the amount of money they are planning to spend
    9·1 answer
  • 5t-shirts and a hat costs £83.00,2 t-shirts and a hat costs £38.00.a)how much does a t-shirt cost?
    14·1 answer
  • What is the length of BC? Round to the nearest tenth
    8·1 answer
  • ‎‎‎‎‎‎‎‎‎‎ ‎‎‎‎‎‎‎‎‎‎‎ ‎‎‎‎‎‎‎‎ ​
    6·1 answer
  • BRAINLY + 50 POINTS
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!