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
Artemon [7]
3 years ago
7

Each of the 10,000 shelves in a certain library is 300 cm long. To estimate how many books in the library need rebinding, a libr

arian takes a sample of 50 books using the following procedure: He first generates a random integer between 1 and 10,000 to select a shelf, and then generates a random number between 0 and 300 to select a location on that shelf. Thus, the pair of random numbers (2531, 25.4) would tell the librarian to include the book that is above the location 25.4 cm from the left end of shelf number 2531 in the sample. Does this procedure generate an SRS of the books in the library? Explain why, or why not.
Mathematics
1 answer:
monitta3 years ago
6 0

Answer:

If all the books are of the same size, this is truly a simple random sampling method.

If not, the random selection of the length of shelf at which the book to be sampled will be picked favours the bigger/fatter books and the process seizes to be a simple random sampling.

Check the explanation for more clarification.

Step-by-step explanation:

In simple random sampling, each member of the population has an equal chance of being sampled. The best way to go about this is usually to truly randomize the sampling technique by assigning numbers to members of a population and randomly picking the numbers. Any member of the population that the number picked belongs to, is picked to be sampled. The best way to pick random numbers is to use a computer program to do it these days.

So, for this problem, the librarian tries as much as possible and does randomize the sampling process enough for the books. But this is indeed a simple random sampling method if all the books truly have equal chance of being selected.

In selecting the shelf, it is as random as possible, but in selecting the book, the random length on the shelf picked will represent random sampling if all the books are similar in size. If not, the bigger/fatter books have a higher chance of being selected than the thinner ones and this seizes to be a random sampling technique if all the books do not have equal chance of being picked.

You might be interested in
Please help me!! <br> solve 31 = x + 25.5
serious [3.7K]

Answer:

x = 5.5

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

31 = x + 25.5

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Subtract 25.5 on both sides:                    5.5 = x
  2. Rewrite:                                                      x = 5.5
6 0
3 years ago
Read 2 more answers
Y is a number such that 6y = 12
nataly862011 [7]
6y = 12
y = 12/6
y = 2

:)
5 0
3 years ago
What is the value of n in the diagram below?
IRINA_888 [86]

Answer:

n = 24

Step-by-step explanation:

(n + 18) and 2n are "complementary angles:"  they add up to 90°.

Thus, n + 18 + 2n = 90.  Combining the n terms results in 3n + 18 = 90.

Then 3n = 72.  Dividing both sides by 3 results in n = 24.

n is 24, so n + 18 is 42 and 2n is 48.  Note that 42 and 48 add up to 90.

5 0
3 years ago
HELP ME SOMEONE PLEASE :(
Lemur [1.5K]

Answer: The answer is A.

Step-by-step explanation:

The formula for the area of circles:

A = πr^2

Plug in the radius

A = π8^2

A = π64

A = 201.06192983/ 201 (rounded)

3 0
2 years ago
Read 2 more answers
I already know the answer to this but
irina [24]

Answer:

yes

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • A city has a population of 310,000 people. Suppose that each year the population grows by 8.25%. What will the population be aft
    12·1 answer
  • Pls answer this with an explanation if you can pg3 pt1
    5·2 answers
  • In City Lake, researchers caught, marked, and released 258 bass. Later, they took a sample of 130 bass and found that 26 were ma
    7·1 answer
  • A cylinder has a volume of 75 cubic inches. What is the volume of a cone that the cone fits exactly inside of?
    13·1 answer
  • How do you find the original price when given the sale price and the percent of the discount
    11·1 answer
  • Help me understand please ;-;
    6·2 answers
  • HELP MEEEEEEE PLSSSS
    12·2 answers
  • 4. What are the coordinates of the x-intercept for the equation y= -1x + 3?
    9·1 answer
  • There are frogs and koi in a pond, and the number of frogs and the number of koi in the pond are independent. Let X represent th
    11·1 answer
  • Tamara is at the store buying pencils. There is a package with 4 pencils that costs $6 or a package with 5 pencils that costs $7
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!