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
e-lub [12.9K]
3 years ago
7

Assume the random variable X is normally distributed with mean muequals50 and standard deviation sigmaequals7. Find the 87 th pe

rcentile.

Mathematics
1 answer:
serious [3.7K]3 years ago
7 0

Answer:

  57.885

Step-by-step explanation:

For such calculations a probability calculator is very helpful. The one in the attachment shows the 87th percentile to be 57.885.

___

A table of the standard normal distribution will tell you the 87th percentile corresponds to a z-value of 1.12639. Then the X value is ...

  X = Zσ +μ = 1.12639(7) +50 = 57.885

You might be interested in
An $80.00 coat is marked down 20%. It does not sell, so the shop owner marks it down an additional 15%. What is the new price of
stiv31 [10]

Answer:

$54.40

Step-by-step explanation:

First, find the new price after the 20% markdown:

80(0.8)

= 64

Then, find the price with the 15% markdown:

64(0.85)

= 54.4

So, the new price of the coat is $54.40

6 0
3 years ago
Your friend gives you a simple regression fit for predicting house prices from square feet. the estimated intercept is –44850 an
Zina [86]

Answer:

  3022.08 . . . dollars per square meter

Step-by-step explanation:

The slope is multiplied by the factor that changes units:

  (280.76 dollars/ft²)×(1 ft²)/(.092303 m²) ≈ 3022.08 dollars/m²

3 0
3 years ago
Sam's van travels 208.8 miles on 9 gallons of gasoline. Hasan's small car travels 234.4 miles on 8 gallons of gasoline. What is
poizon [28]

Answer:

The difference between the vehicles is 0,009 gallons per mile.

Step-by-step explanation:

To know the difference between the vehicles in gallons per mile we need to obtain this information for each car:

-Sam´s van

  Gallons per mile: 9 gallons/208.8 miles

  Gallons per mile: 0.0431

-Hasan´s small car:

 Gallons per mile: 8 gallons/234.4 miles

 Gallons per mile: 0.0341

The difference between the vehicles is:

0.0431-0.0341= 0,009 gallons per mile

5 1
3 years ago
Read 2 more answers
Help please as soon as possible
skad [1K]
The value of y will be equal to 4.

Reason : The length of the opposite cord is equal and therefore the distance from the centre to the cord will be equal.

Ans: 3rd option (4)

Hope this helps!
4 0
3 years ago
Read 2 more answers
Plz answer right i need it for a quiz
lisov135 [29]

Answer:

a

Step-by-step explanation:

that is the answer

3 0
3 years ago
Other questions:
  • I need help help me
    7·1 answer
  • Y=2x-2 and 4x+2y=12. solve the equation PLEASE SHOW WORK​
    10·2 answers
  • A home alarm system randomly assigns a five-character code for each person. The code will not repeat a character. The characters
    10·2 answers
  • Please Help
    5·1 answer
  • Write a program that will solve a quadratic equation: ax2 + bx + c = 0. The program must ask the user to enter the values for a,
    8·1 answer
  • Calculate an<br> 8% tax on an<br> $80 tablet.
    14·2 answers
  • A parabola and its focus are shown on the graph. The vertex of the parabola is at (0,0).
    11·2 answers
  • A small business record its profits for three
    14·1 answer
  • Please help and plz make sure it’s right :)
    9·2 answers
  • For a complex number written in polar form, its representation is unique as long as the argument is restricted to
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!