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
Sati [7]
3 years ago
15

The concrete canoe team does some analysis on their design and calculates that they need a compressive strength of 860 psi. They

test several mix designs and chose one that has a sample mean of 900 psi with a standard error of the mean of 10 psi. The team wishes to be very conservative in their design and calculates a one-sided 99% confidence interval on the lower limit. What is this value?
Engineering
1 answer:
vlada-n [284]3 years ago
8 0

Answer:

874 psi

Explanation:

Given a sample mean (x') = 900,

and a standard error (SE) = 10

At 99% confidence, Z(critical) = 2.58

That gives 99% confidence interval as,

x' ± Z(critical) x SE = 900 ± 2.58 x 10

The value of the lower limit is,

900 - 25.8 = 874.2

≈ 874 psi

You might be interested in
A long corridor has a single light bulb and two doors with light switch at each door. design logic circuit for the light; assume
sattari [20]

Answer and Explanation:

Let A denote its switch first after that we will assume B which denotes the next switch and then we will assume C stand for both the bulb. we assume 0 mean turn off while 1 mean turn on, too. The light is off, as both switches are in the same place. This may be illustrated with the below table of truth:

A                    B                       C (output)

0                    0                        0

0                    1                          1

1                     0                         1

1                     1                          0

The logic circuit is shown below

C = A'B + AB'

If the switches are in multiple places the bulb outcome will be on on the other hand if another switches are all in the same place, the result of the bulb will be off. This gate is XOR. The gate is shown in the diagram adjoining below.

3 0
3 years ago
Can you reduce energy use without compromising people's basic needs (such as opening a car, cooking food, home lighting, electri
Liono4ka [1.6K]

Answer:

   yes

  • electric and/or hybrid cars
  • microwave ovens
  • LED lighting
  • low-power electronics

Explanation:

Advances in technology and changes in social organization have brought about reductions in energy use on many fronts.

  • hybrid/electric vehicles have reduced transportation energy needs
  • microwave ovens have reduced cooking energy needs
  • LED lighting has reduced lighting energy needs
  • low-power electronics have reduced the energy cost of technology and entertainment
  • heat pumps and insulated windows have reduced energy needs for home heating and cooling
  • zoning laws have reduced the need for travel to work and shopping areas
4 0
3 years ago
At what stage of development is an engineering team the most productive?
Alexxx [7]

Answer:

A

Explanation:

A because you are continuing to keep moving and thinking.

3 0
3 years ago
Read 2 more answers
What should -7/56 BE DIVIDE TO GET -1/8​
aivan3 [116]

Answer:

7/7

Explanation:

7/56 ÷1

7/56÷ 7/7

7/56 ×7/7

1/8

5 0
3 years ago
Read 2 more answers
An aluminum metal rod is heated to 300oC and, upon equilibration at this temperature, it features a diameter of 25 mm. If a tens
Natalka [10]

Answer:

It will results in mechanical hardening.

5 0
3 years ago
Read 2 more answers
Other questions:
  • True or false? Don't break or crush mercury-containing lamps because mercury powder may be released.
    8·1 answer
  • Question 4 (1 point)
    8·1 answer
  • A displacement transducer has the following specifications: Linearity error ± 0.25% reading Drift ± 0.05%/○C reading Sensitivity
    8·1 answer
  • The themes around which social sciences texts are organized boost understanding by
    11·1 answer
  • The rainfall rate in a certain city is 20 inches per year over an infiltration area that covers 33000 acres. Twenty percent of t
    6·1 answer
  • Complete the following sentence.
    7·1 answer
  • Why are Gas cars Bad?(cons) give me reasons why gasoline cars are bad<br><br>Thx if u help ​
    14·1 answer
  • Who does each person work for? Monica works for a power company, Travis works for a utilities company, and Maggie is self-employ
    15·2 answers
  • It is acceptable to mix used absorbents.
    15·1 answer
  • Conclude from the scenario below which type of documentation Holly should use, and explain why this would be the best choice
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!