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
Yakvenalex [24]
3 years ago
5

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 240240 engin

es and the mean pressure was 7.57.5 pounds/square inch (psi). Assume the population standard deviation is 1.01.0. The engineer designed the valve such that it would produce a mean pressure of 7.67.6 psi. It is believed that the valve does not perform to the specifications. A level of significance of 0.10.1 will be used. Find the P-value of the test statistic. Round your answer to four decimal places.
Mathematics
1 answer:
mojhsa [17]3 years ago
5 0

Answer:

p-value = 0.1213  (to 4-decimal places)

Step-by-step explanation:

Given:

N = 240

mean  = 7.5

s = 1.0

Solution

With N=240 and using the central limit theorem, distribution can be approximated as normal.

Let

Null hypothesis H0, mu = 7.6

Alternate hypothesis, mu not equal to 7.6  (two-tail test)

for

Alpha = 0.1 (two sided)

Z = sqrt(N)(mean – mu)/s = sqrt(240)(7.5-7.6)/1.0 = -1.54919

p-value  

= P(|Z|>1.54919)  

= 2P(Z>1.54919)

= 2(1-P(Z<1.54919)

=2(1-0.9393)     (using normal distribution table)

=0.12134

Since alpha = 0.1 < p-value (0.1213), H0 that mean = 7.6 is not rejected.

You might be interested in
I need help with this lol
Paul [167]

a

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
The equation shows the relationship between x and y:
miss Akunina [59]
Okay so your slope is going to be -9 because that is the rise over run for that equation. 5 is you y-intercept.
8 0
3 years ago
Read 2 more answers
Mr. Young has a piece of rope. He uses 1/4 of it to tie some boxes together. He then uses 5/9 of the remainder to make a jump ro
Kazeer [188]
Divide 120 by 4 to get 1/9 of the rope: 30. Then multiply it by 9 to get the part after 1/4 was given away: 270. Now divide it by 3 to get 90 and lastly, multiply it by 4 to get a final answer of 360 centimeters. Hope this helps!
3 0
3 years ago
In.<br>7.a. Evaluate.<br>(1) (8-2 x 124) ÷27<br>​
Korvikt [17]

Answer:

-8.88888888889.............

8 0
3 years ago
What is the quotient of 5s ad 8
butalik [34]

Answer:

0.625 s

Step-by-step explanation:

5s/8

0.625 s

4 0
3 years ago
Other questions:
  • Cody is an environmental scientist inquiring about the percentage of deer ticks in a certain national park that are infected wit
    12·1 answer
  • You are riding the bus to school and you realize it is taking longer because of all the stops you are making. The time it takes
    5·2 answers
  • Willing to Mark brainiest!
    15·2 answers
  • 5. Sally is shopping for diapers and sees a box with 216 diapers for $39.98 and a box with 88
    14·1 answer
  • Sally is given the information ƒ(1)= 0, ƒ(-2)=0 and ƒ(3)=0. which are the factors of the polynomial?
    6·1 answer
  • I need to know which of these answer choices are correct.
    14·1 answer
  • I'm lost on this please help
    13·1 answer
  • Tina spends $50.86 at the craft store. She buys 5 yards of fabric at $8.98 per yard and 2 spools of thread. What is the price of
    14·2 answers
  • Question 1 of 42
    12·1 answer
  • Please help brainliest who answer's first and correct
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!