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
denpristay [2]
2 years ago
7

A quality control engineer Is interested in the mean length of sheet insulation being cut automatically by machine. It is known

that the standard deviation in the cutting length that this machine produces is 0.15 feet. A sample of 70 cut sheets yields a mean length of 12.14 feet. This sample will be used to obtain a confidence interval for the mean length cut by machine. Referring to problem statement, the Z value to use in obtaining the 99% confidence interval is approximately .A.1.645B. 1.96C.3.23D.2.58
Mathematics
1 answer:
nydimaria [60]2 years ago
7 0

Answer:

D.2.58

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.005 = 0.995, so Z = 2.58.

The answer is given by option D.

You might be interested in
Justify each step with an algebraic property. 16+x=12
lana [24]
-4 would be the correct answer to the problem
6 0
2 years ago
Read 2 more answers
Help me pls ! if you do l give you the brainiest
Zina [86]
The first answer is correct because the terms are alike in both expressions
5 0
2 years ago
Read 2 more answers
What is the degree of 12x^4-8x+4x^2-3
lord [1]
Dat is 4th degree because x is raised to the 4th power and that is the highest power of the placholder

4th degree
6 0
3 years ago
Read 2 more answers
Cheri walked 12 blocks in 36 minutes. What was Cheri's speed per minute?
Rina8888 [55]
Cherish walled 3 blocks in 1 minute.
I know this because 36+÷12=3.
Which three represents the number of blocks walked in one minute.
8 0
3 years ago
The period of a function is 4 pi how many cycles of the function occur in a horizontal length of 12 pi
eduard

Answer:

3 cycles

Step-by-step explanation:

in one period, you have one full cycle

because the period for this function is 4pi, you have one cycle per 4pi

if you have a total of 12pi, you would have 3 cycles (12pi/4pi=3)

hope this helps!

3 0
3 years ago
Read 2 more answers
Other questions:
  • I ACTUALLY REALLY NEED A ANSWER FOR THIS SO IF YOU DONT ACTUALLY NO PLEASE DO NOT ANSWER!!!!
    14·1 answer
  • Which equation represents the line that passes through the points (2, 4) and (1, -3)?
    12·1 answer
  • When using a debit card: Question options: A:There are always fees. b:Identification is always required. c:You still need to rec
    15·1 answer
  • Solve 7x - 4 = 5x + 15 for x.<br> 11/2<br> 19/2<br> 19/12
    6·1 answer
  • There is 35 boys and 42 girls what is the ratio
    11·2 answers
  • Which of the following are true statements about any regular polygon? Check all that apply
    6·2 answers
  • If sin tetha=root3/2, what is cos tetha?​
    7·1 answer
  • Given the function: f(x)=X^2+1<br> a) Find f(–6) b) Find f(8)
    10·1 answer
  • HELP ASAP.....NO LINKS AND NO TROLLING PLS
    8·1 answer
  • How to do [7^{6} * (2/7)^{5}] ÷ (2^{2}). FIRST TO ANSWER WILL BE MARKED AS BRAINLIEST/
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!