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
Lesechka [4]
2 years ago
10

Suppose a shipment of 400 components contains 68 defective and 332 non-defective computer components . From the shipment you tak

e a random sample of 25. When sampling with replacement (so that the p = probability of success does not change), note that a success in this case is selecting a defective part. The standard deviation of this situation is?
Mathematics
1 answer:
Alona [7]2 years ago
6 0

Answer:

The standard deviation for the number of defective parts in the sample is 1.88.

Step-by-step explanation:

The sample is with replacement, which means that the trials are independent, and thus, the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x successes on n repeated trials, with p probability.  

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

68 defective out of 400:

This means that p = \frac{68}{400} = 0.17

From the shipment you take a random sample of 25.

This means that n = 25

Standard deviation for the number of defective parts in the sample:

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{25*0.17*0.83} = 1.88

The standard deviation for the number of defective parts in the sample is 1.88.

You might be interested in
The surface area of a typical classroom floor is closest to______.
avanturin [10]
Answer would be C. Why A would be incorrect: 100m^2 is 100m × 100 m. That would be as big as a football field. Why B would be incorrect: 1cm^2 is 1cm × 1cm. You can use a regular 15 cm to measure a piece of paper with the length of 1cm each side. Why C would be correct: 1m^2 = 1m × 1m and it is also equals to 60cm × 60 cm. A 1 meter ruler = 60 cm = 4 times of your average 15 cm ruler. So, it is reasonable that a classroom is 10m by 10m in length and breadth. Why D would be incorrect: The same explanation applies to here as well. Things that can be measured with 1m × 1m is a square table so your classroom can't be that small to fit an average of 30 to 40 students in there. I hope my explanations were detailed and easy to understand. :)
4 0
2 years ago
Read 2 more answers
Assume that the Poisson distribution applies and that the mean number of aircraft accidents is 9 per month. Find​ P(0), the prob
Ugo [173]

Answer: 0.0001

It is unlikely to have a month with no aircraft​ accidents .

Step-by-step explanation:

Given :  Mean number of aircraft accidents = 9 per month

The Poisson distribution formula :-

\dfrac{e^{-\lambda}\lambda^x}{x!}, where \lambda is the mean of the distribution.

If X = the number of aircraft accidents per month, then the probability that in a​ month, there will be no aircraft accidents will be :-

\dfrac{e^{-9}(9)^0}{0!}=0.000123409804087\approx0.0001

Hence, the probability that in a​ month, there will be no aircraft accidents = 0.0001

Since this is less than 0.5 , therefor it is unlikely to have a month with no aircraft​ accidents .

5 0
3 years ago
The room measures 8 inches by 5 inches on the blueprint. If the scale on the blueprint is 1 inch by 4 feet, what is the actual a
larisa86 [58]
Hi there!

To solve this problem, we need to multiply each number by 4 ft.

8×4=32
5×4=20

Now, we films the area.

32×20 = 640

The area of the room is 640 feet squared.

Hope this helps!
3 0
3 years ago
PLEASE HELP
Drupady [299]

Answer:

2x+8-2y

Step-by-step explanation:

4x-2x+5+3-2y

2x+8-2y

8 0
2 years ago
Read 2 more answers
If she makes 2 more batches of batter how many cups of flour will be left?
WINSTONCH [101]
One cup of flour will be e left
5 0
3 years ago
Read 2 more answers
Other questions:
  • Find the Missing length
    8·1 answer
  • What is the estimate of 32034
    14·1 answer
  • MATH HELP ME ASAP PLS!!!
    10·1 answer
  • Bonita said that the product of 5/6× 1 2/3 is 7/3.<br> How can you tell that her answer is wrong?
    10·1 answer
  • A sign on the pumps at a gas station encourages customers to have their oil checked, and claims that one out of 10 cars needs to
    6·1 answer
  • A bag contains 25 marbles, some blue and some green. The ratio of blue marbles to green ones is 3:2 how many green marbles are t
    12·1 answer
  • (6)/(7)x-(2)/(5)y+(5)/(7)(y+x)<br> PLEASE HELP!!!!!
    6·1 answer
  • Please answer I need this answer fast please​
    5·2 answers
  • Mrs. Murphy takes her two cats to the veterinarian in a pet carrier that weighs
    13·1 answer
  • Assume that you have saved $2,000 for the purchase. How much of this money will you be able to put towards the purchase price of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!