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
irina1246 [14]
3 years ago
10

A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company prod

uces. He knows from numerous previous samples that when this service life is in control it is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with the results?
Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
4 0

Answer:

1 495 500 505 500

2 525 515 505 515

3 470 480 460 470

Step-by-step explanation:

Suppose to be sample are

  • 495 500 505 500
  • 525 515 505 515
  • 470 480 460 470              

In the given sample if sample 3 is difficult to control .Because engineer wants to construct a sample mean controlling the service to his company produces.In sample set first two sets have continuous four headlamps but in third it is difficult to handle the control.

You might be interested in
Find the value of x.
Zolol [24]

Answer:

34

Step-by-step explanation:

8 0
3 years ago
Find the equation of the plane z = mx + ny + b which contains the points (0,0,6), (1,0,-3) and (0,2,5).
leonid [27]
The three points give you three equations, which you can solve by your favorite method.
.. 0m +0n +b = 6
.. 1m +0n +b = -3
.. 0m +2n +b = 5

(m, n, b) = (-9, -1/2, 6)
so the equation of the plane can be written as
.. z = -9x -1/2y +6

_____
In standard form, this would be
.. 18x +y +2z = 12

8 0
3 years ago
camille rides the bus to work. to get downtown,she can ride any bus number between 11 and 34, that can be divided evenly by 3, a
almond37 [142]

Answer:

12, 18, 24, 30

Step-by-step explanation:

List the numbers between 11 and 34 that can be evenly divided by 3:

12, 15, 18, 21, 24, 27, 30, 33

Then eliminate the odd numbers, obtaining:

12, 18, 24, 30

These are the four busses that Camille could ride to work.

7 0
3 years ago
Brainiest will be given . Please help me
mixas84 [53]

Answer:

If the shape of end face has n sides

Then, in total, there are n+2 faces

Using that formula

Faces in 20-sided polygon = n+2 = 20+2 = 22

Step-by-step explanation:

Pls vote as brainliest

6 0
3 years ago
Simplify 8r - 3j + 9j - 2r
Shkiper50 [21]

Answer:

6j + 6r :)))))))))))))))))

3 0
3 years ago
Read 2 more answers
Other questions:
  • HELP HELP ASAP PLZZZZZZZZ I will make u brainliest!!!!!
    5·2 answers
  • ( n + -2 ) x ( n - -4 ) = 27<br><br> What are the two n's?
    10·2 answers
  • Order the steps to solve the equation<br> Log(x^2-15)=log(2x) form 1 to 5.
    12·2 answers
  • How can you decompose the composite figure to determine its area?
    12·1 answer
  • Which inverse operation would be used to verify the following equation?
    6·2 answers
  • Write a number in which the digit 8 is ten times the value of the digit 8 in 4.381
    14·1 answer
  • Is 5 and 13 a right triangle
    5·2 answers
  • Complete the proof by providing the missing reasons.
    14·1 answer
  • Simplest form of 45/120
    13·2 answers
  • What is the value of 6x+7y-5 when x =2 and y=3​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!