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
vaieri [72.5K]
3 years ago
10

Tensile strength tests were performed on two different grades of aluminum spars used in manufacturing the wing of a commercial t

ransport aircraft. From past experience with the spar manufacturing process and the testing procedure, the standard deviations of tensile strengths are assumed to be known. The data obtained are as follows:
n_1 = 10
x_1 = 87.6
σ_1 = 1
n_2 = 12
x^2 = 74.5
σ_2 = 1.5.

Required:
If μ _1 and μ _2 denote the true mean tensile strengths for the two grades of spars. Construct a 90 percentage confidence interval on the difference in mean strength.
Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
5 0

Answer:

(12.141, 14.059)

Step-by-step explanation:

Explanation is provided in the attached document.

Download docx
You might be interested in
100 points, put nonsense, get reported. Susan wants to build a floor to put at the bottom of her tree house. She made the scale
Elanso [62]

Divide the length of the scale drawing by the scale (2.5) then multiply that by the scale feet (3)


11 inches / 2.5 = 4.4

4.4 x 3 = 13.2 feet


Answer: 13.2 feet

3 0
2 years ago
Read 2 more answers
3. Create an equation that represents the total cost, p, of buying s same-day pass for
patriot [66]

Answer:

p * s(3) + b

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
I need help with this?? Anyone?
sergey [27]
- Question -

Which statement about solving inequalities is true?

- Answer -

A)

Adding the same value to both sides of an inequality does not change the solution set.


- The Wolf -
3 0
3 years ago
Read 2 more answers
If two 6-sided dice are rolled what is the probability that both numbers will be even?
Tamiku [17]
The probability of one dice rolling an even number is 1/2 as half the numbers are even. Since the events are independent, and there are 2 dice, we need to square 1/2 to get 1/4, assuming they are both fair dice
3 0
1 year ago
Solve the system of equations using elimination.
tester [92]

Answer:

y = 16 + 3/11

x = -76/11

Step-by-step explanation:

2y - 5x = -2

3y + 2x = 35

__________

(2y - 5x = -2)*3

(3y + 2x = 35)*2

__________

6y - 15x = -6

6y +4x = 70

__________

(6y - 15x = -6) - (6y +4x = 70)

15x - 4x = -6 -70

__________

11x = -76

x = -76/11

__________

3y +2(-76/11) = 35

3y = 35 + 152/11

3y = 13 + 35 + 9/11

3y = 48 + 9/ 11

y = 16 + 3/11

8 0
3 years ago
Other questions:
  • I really need help please
    6·1 answer
  • A cone has a circular base with a diameter of 18 inches the height of the cone is 48 inches what is the approximate lateral area
    9·1 answer
  • Eric noticed that his basil plant grows 5 cm every day. He starts recording the height when the plant is 22 cm tall. He wants to
    13·1 answer
  • My shadow in the back. Yeah no I need help. One again.
    11·1 answer
  • Find the missing variable for a parallelogram: A=64 h= b= 12.6
    8·1 answer
  • The CEO of Apex Corporation exercised his option to purchase 2,085 shares of Apex stock at $12 per share. He immediately sold th
    6·1 answer
  • 1. Which of these transformations are isometries? The diagrams are not drawn to scale.
    8·1 answer
  • Will give brainlist
    15·1 answer
  • Jack has two jobs. One job is at a gas station where he earns $11.00/hr and works 8 hours per week. His other job is walking dog
    8·1 answer
  • Q26. Look at the image below
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!