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
pishuonlain [190]
3 years ago
14

A pollster uses a computer to generate 500 random numbers and then interview the voters corresponding to those numbers. identify

the type of sampling used in this example sampling
a. stratified sampling
b. systematic sampling
c. cluster sampling
d. simple random sampling
Mathematics
1 answer:
Bond [772]3 years ago
4 0

Answer: D. Simple Random Sampling

Step-by-step explanation: When selection is made or based on chance which is equal or the same for all members within a population. In the scenario described above, there is no prior shuffling, arrangement or segregation of members within the population into groups or subgroups, rather the interviewed voters were chosen at random directly from within the larger population based on equal chance. Therefore voters already have their numbers, then using a random number generator, voters whose number corresponds were interviewed is a clear scenario of simple Random Sampling.

You might be interested in
<img src="https://tex.z-dn.net/?f=%20%5Crm%20%5Cint_%7B0%7D%5E%20%5Cinfty%20%20%5Cfrac%7B%20%5Csqrt%5B%20%20%5Cscriptsize%5Cphi%
Rasek [7]

With ϕ ≈ 1.61803 the golden ratio, we have 1/ϕ = ϕ - 1, so that

I = \displaystyle \int_0^\infty \frac{\sqrt[\phi]{x} \tan^{-1}(x)}{(1+x^\phi)^2} \, dx = \int_0^\infty \frac{x^{\phi-1} \tan^{-1}(x)}{x (1+x^\phi)^2} \, dx

Replace x \to x^{\frac1\phi} = x^{\phi-1} :

I = \displaystyle \frac1\phi \int_0^\infty \frac{\tan^{-1}(x^{\phi-1})}{(1+x)^2} \, dx

Split the integral at x = 1. For the integral over [1, ∞), substitute x \to \frac1x :

\displaystyle \int_1^\infty \frac{\tan^{-1}(x^{\phi-1})}{(1+x)^2} \, dx = \int_0^1 \frac{\tan^{-1}(x^{1-\phi})}{\left(1+\frac1x\right)^2} \frac{dx}{x^2} = \int_0^1 \frac{\pi2 - \tan^{-1}(x^{\phi-1})}{(1+x)^2} \, dx

The integrals involving tan⁻¹ disappear, and we're left with

I = \displaystyle \frac\pi{2\phi} \int_0^1 \frac{dx}{(1+x)^2} = \boxed{\frac\pi{4\phi}}

8 0
2 years ago
If DEF and MNO are two triangles such that DE=MN and EF=NO, which of the following would be sufficient to prove that triangles a
Delvig [45]

Answer:

  D.  ∠E ≅ ∠N

Step-by-step explanation:

The pair of sides meet at vertex E in ∆DEF and at vertex N in ∆MNO. Since the sides that make up angles E and N are shown congruent, it is sufficient to show ...

  ∠E ≅ ∠N

Then the SAS congruence postulate can be claimed.

__

<em>Additional comment</em>

The alternative is to show DF ≅ MO. That would allow you to claim SSS congruence. That is not an answer choice.

3 0
3 years ago
Mr. Waugh paid $42.00 for 12 gallons of gasoline. Ms. Peters paid $31.50 for 9 gallons of gasoline. What was theprice per gallon
dmitriy555 [2]

Answer:

$3.50 per pound

Step-by-step explanation:

Divide 42  by 12 or 31.5 by 9 and you get 3.5. In money, that is $3.50

4 0
3 years ago
Read 2 more answers
How many kg in a pound
slava [35]
0.453592 KG in a pound

7 0
3 years ago
What is7/20 as a decimal
xxMikexx [17]
It is 0.35 is the answers
5 0
3 years ago
Read 2 more answers
Other questions:
  • HELP PLEASE!!!!
    6·2 answers
  • 3. Which of the following is a composite number? A. 63 B. 0 C. 19 D. 1
    13·2 answers
  • Q. You're on a residential construction team doing
    5·1 answer
  • Answer for 701 km -523 km 445m
    12·1 answer
  • The point (6, n) lies on the circle whose equation is (x − 1)2 + (y − 5)2 = 50. Find the values of n
    8·2 answers
  • Enter the difference as a mixed number
    11·2 answers
  • 0.051 in scientific notation
    11·2 answers
  • What is the absolute value of -9.8 ?
    5·2 answers
  • Please answer this question, and happy valentines day!!
    11·1 answer
  • A 14% discount on a dryer purchased, amounted to $70. Calculate the net price.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!