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
andre [41]
3 years ago
14

On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally dist

ributed with σ = 100. the composition of the bar has been slightly modified, but the modification is not believed to have affected either the normality or the value of σ.
Mathematics
1 answer:
KiRa [710]3 years ago
6 0
1) The formula used for determining the confidence interval is
Sample mean +/- Critical value (or z-score corresponding to 90% confidence) * Standard
error of mean
8439 +/- 1.645 * 100/sqrt 25
8439 +/- 1.645 * 20
8439 +/- 32.9
2) The only difference in this case is finding the critical value i.e., z-score corresponding to 92% confidence which is 1.75 approximately
Then the confidence interval is
8439 +/- 1.75 * 100/sqrt 25
8439 +/- 1.75 * 20
8439 +/- 35
Lower limit is 8439 - 35 = 8404
The upper limit is 8439 + 35 = 8474
You might be interested in
10 POINTS only answer if you KNOW
kenny6666 [7]
The answer is D, tony would always be behind Robert.
5 0
3 years ago
Please, someone, help me
qwelly [4]

Answer:

282.7 in³

Step-by-step explanation:

The solid is a cylinder

Volume of the cylinder = πr²h

Where,

radius (r) = 3 in.

height (h) = 10 in

Volume = π*3²*10

= π*9*10

= π*90

= 282.743339 ≈ 282.7 in³ (nearest tenth)

8 0
3 years ago
A bank receives a deposit for $30,000. If the bank has a 10 percent reserve requirement, approximately how much money could this
guajiro [1.7K]

Answer:300,000

Step-by-step explanation:

Ap3x

5 0
3 years ago
3x + 9 > -18
aleksklad [387]

Answer:

The written form would be "Nine more than three times a number is greater than -18.

Step-by-step explanation:

To graph it, you must first solve for x.

3x + 9 > -18

3x > -27

x > -9

Now we can graph this by putting an open dot at -9 and then drawing an arrow to the right.

4 0
3 years ago
Mr.lucido purchases a new video game system that is on sale for 35% off the regular retail price. if the retail price is $429, w
sammy [17]

Answer:

Regular price: $429

35% discount: 278.85

5% tax: $13.94

Final cost: 292.79

Step-by-step explanation:

regular price=$429

0.35(429)=150.15

429-150.15=278.85

35% discount amount: $278.85

278.85(0.05)=13.94

278.85+13.94=292.79

6 0
3 years ago
Other questions:
  • Mikel wants to hire a carpenter to remodel a bathroom.
    13·1 answer
  • A skier skis along a circular ski trail that has a radius of 1.25 km. The skiier starts at the East side of the ski trail and tr
    10·1 answer
  • Let f(x)=(8x^4-3)^3 and g(x)=8x^4-3 given that f(x)=(h g)(x) , find h(x)
    13·1 answer
  • Which of the following terms best describes a comparison of two numbers?
    11·2 answers
  • Find the solution for the following equations using substitution or elimination:
    14·1 answer
  • The drop down option for the least minimum is k,g,f,h & the maximum options are h,g,k,f
    7·1 answer
  • Calculate the slope of the line.Please help!!
    5·1 answer
  • THIS IS MY LAST QUESTION. Okay, im a bit anxious to get this done. Ive done half the problem, I just need the other half.
    5·1 answer
  • My Christmas Tree is 7 feet tall and has a radius at the bottom of 4 feet. What is the total Volume of my Christmas Tree?​
    15·1 answer
  • If C=5/9(F-32) what is the value of F when C =40
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!