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
notsponge [240]
3 years ago
14

manufacurer is developing a new type of paint based on the results of the test the manufacturer concluded that the mean life efo

re corrosive failure for the nrew paint is 155 hours with a standard deviation find probability that paint on a sample of 65 test panels will have mean life before corrosive failure of less that
Mathematics
1 answer:
AURORKA [14]3 years ago
3 0

Answer:

The probability is 0.0005.

Explanation:

The stated question is incomplete. The complete question is as follows.

<em>A manufacturer is developing a new type of paint. Test panels were exposed to various corrosive conditions to measure the protective ability of the paint. Based on the results of the test, the manufacturer has concluded that the mean life before corrosive failure for the new paint is 155 hours with a standard deviation of 27 hours. If the manufacturer's conclusions are correct, find the probability that the paint on a sample of 65 test panels will have a mean life before corrosive failure of less than 144 hours. </em>

The mean life is 155 hours. Hence, μ = 155.

The standard deviation is 27 hours. Hence, σ = 27.

The sample size in 65 test panels. Hence, n = 65.

We can use the central limit theorem to find the probability that the mean life before corrosive failure is less than 144 hours. By the central limit theorem:

P(X < 144) = P[(X - μ) / (σ / √n) < (144 - 155) / (27/√65)]

P(X < 144) = P(Z < -3.2846)

Using the Z-value table for normal distribution, this value turns out to be:

P(X < 144) = 0.0005

You might be interested in
X^3 times x^? equals to x^17 <br><br> what’s the missing exponent?
ElenaW [278]

Answer:

  14

Step-by-step explanation:

The applicable rule of exponents is ...

  (a^b)(a^c) = a^(b+c)

__

You have ...

  (x^3)(x^a) = x^17

  x^(3+a) = x^17

Equating exponents, we get ...

  3 +a = 17

  a = 14

The missing exponent is 14.

5 0
3 years ago
Write the following quadratic in vertex form X^2-10x+7
grin007 [14]
Hello,

y=x²-10x+7=x²-2*5x+25-25+7=(x-5)²-18
================================
5 0
3 years ago
A group of 12 students goes on a school field trip, 6 are in third grade. which fraction is equivalent to 6 12
Elis [28]

The fraction which is equivalent to 6/12 is 1/2

What does a fraction mean?

In the first place, fraction is a numerical quantity or relationship where one number is expressed in terms of another.

In order to determine the equivalence of 6/12 in fraction , we need reduce 6/12 to the lowest term, since 6 is common to 6 and 12 and that 6 divided by gives 1 and 12/6 gives 2, which means that we are left 1/2

The correct fraction which is equivalent to 6/12 is 1/2

Find out more about fraction on:brainly.com/question/5243429

#SPJ1

Full question:

A group of 12 students goes on a school field trip, 6 are in third grade. which fraction is equivalent to 6/12?

(A) 1/3

(B)1/4

(C) 1/6

(D) 1/2

5 0
2 years ago
2. When completing a problem that deals with American currency, which number would not be an appropriate answer?
k0ka [10]
The answer is $5.935560
6 0
3 years ago
Plz help this is due today AND NO LINKS OR GROSS PICTURES OR I REPORT
Zina [86]

Answer:

I think its A

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • I need help the number 10!!' ASAP!
    12·2 answers
  • A two digit number is 4 times the sum of its digits and twice the product of its digit.FIND THE NUMBER
    6·1 answer
  • Zach wants to build a slanted skateboard ramp. He knows he wants the ramp to form a 15 degrees angle with the ground and be 4 fe
    8·1 answer
  • Need this asap please !:)
    12·1 answer
  • Please answer truefully i giv you brainlistet
    8·1 answer
  • I have a big question what is 720 x 0.1
    15·2 answers
  • Jhfxcvbjiuyfvbno<br> Cccvhiihji nr
    14·1 answer
  • Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi and enter your answer as a decimal.
    11·2 answers
  • Explain why the triangle are similar. Then find the distance represented by x
    15·1 answer
  • If you stand facing east and turn through 3/4 of a revolution, in which direction will you be facing?​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!