5

16. Why would a survey of a convenience sample not be trustworthy?...

Question

16. Why would a survey of a convenience sample not be trustworthy?

16. Why would a survey of a convenience sample not be trustworthy?



Answers

In sampling, why is obtaining a representative sample important?

Following a solution to number four and this says, or it asks, uh, why would you be wary or why should you be wary of surveys that don't report the margin of air, especially if there's a large margin of air. So I let go and write that down, especially when the margin of error is large. It could, yeah, distort the truth and it doesn't give you quite an accurate, um, so, you know, it doesn't give you an accurate view of what's actually going on. And you see this a lot uh in studies, especially, you know, whenever you turn on the tv and and see politics every four years, um, you'll generally see this, you know, and with with approval or disapproval and there's always a margin of error that, you know, doesn't necessarily paint the right picture. So like, for example, let's say 47 approve of presidents, you know, whoever the president is handling of the economy. Okay, so just looking at that, it says, okay, you know, that means he's in trouble because, You know, 47%, that's less than 50 is significantly less than 50. You know, there's no way this president is going to win reelection when in fact there's usually, you know, in small print plus or minus a certain percentage. So, you know, let's just say If the margin of air was 5%, how does that change things? That means potentially, okay, possibly 52% approved in this case. Okay. Because 47 plus five is 52%. Now it could go the other way to it could be 42% that approved, in which case, you know, that's even worse. But that margin of error that does make a difference in this situation. So always be wary of studies that don't show that margin of error because it doesn't really give you an accurate picture of what's really going on.

Here. We curious. You know why my A random sample be difficult to obtain. Um and so there are a few reasons Iran example might be difficult to obtain, even though it's really necessary. One reason is it could be time consuming. You have tow, uh, determine a label for every single person that you're gonna be asking or whatever you're sampling. So if you want a sample of 10,000 people where they all are gonna have to be assigned a number, so it might be time consuming Um, if you're on a job that's asking you to do this well, you might not have enough time to take to really fairly do a random sample. Um What That said it could be expensive. It might need either a lot of computing power. It could mean that you need to have a lot of people out in the field collecting this data. You might have to go to lots of different locations. So are a lot of reasons that random sampling could be expensive. And then, lastly, it might be too difficult to simply sample a population of interest large enough to the point where it's gonna be representative So the last little bit here is why I could it be difficult to obtain? Well, you might have spent all the time and you want to spend all the money. We still might have missed getting a truly representative sample of the population, Um, and so that would add one more difficulty in obtaining a random sample, so it's still may not entirely represent the population.

What is convenient sampling convenient sample sample is a sample in which the individuals are easily obtained and not based on randomness. So one of the main problems here is lack off randomness, right? Lack off randomness. So over here, the sample is easily obtained and it is not randomly selected. So what is going to happen? You know, in this case, we are bound to get a voluntary response. Bias, right. These kinds of samples are known as voluntary response samples, voluntary voluntary response, voluntary response samples. All right, so let's say that if I am standing in front off a mall and I am asking certain questions to people, it is up to the people whether they want to answer me or not. Or, you know, the people who are having more positive answers to my question might answer me more, right? If suppose I'm asking a question that some people may feel is biased and they will simply walk right past me, they're not going toe. Answer my question. So it is quite possible that in this kind of off sampling, I will get biased results. I will get biased results. Great. I might get biased results and hence this kind off sampling is ill advised. First of all, there is a no, There is a possibility of getting biased results, and the second one is that lack off randomness. This kind of sample is acquired easily, so this is not randomly selected. This is just based on the convenience of the researchers.

Okay, suppose we have population that is um billion get in people and we're going to count one PM people. Was the results? It's gonna be very quality and very slow. Either every sample it sample. And then we can reduce the number of size, maybe terrorism, 100 per sounding Uh huh. There isn't a common and challenging. You sign as large, expensive and the surrounding faster. So this way is not preferred. This race prefers. That's why we always prefer to use a sample instead of using the whole. Okay. So.


Similar Solved Questions

5 answers
In an opinion poll, voters were asked whethcr they supported certain piece of legislation Out of 115 high incomc respondents (H) 38 sup- ported it, out of 211 middle income rcspondents (M) 51 favored it, and out of 147 low income respondents (L) 42 supported it. At 0.05 significancc lcvcl test the hypothesis that the support for the legislation is the same in the all three income level groups
In an opinion poll, voters were asked whethcr they supported certain piece of legislation Out of 115 high incomc respondents (H) 38 sup- ported it, out of 211 middle income rcspondents (M) 51 favored it, and out of 147 low income respondents (L) 42 supported it. At 0.05 significancc lcvcl test the h...
5 answers
We consider the matrices A = 3,8-( = 3).c-(1 : -(2 9 Compute if pos sible the matrices 2A B - 24, AC and CD.
We consider the matrices A = 3,8-( = 3).c-(1 : -(2 9 Compute if pos sible the matrices 2A B - 24, AC and CD....
5 answers
Using the expanded algorithm, add the following numbers. Show your work Place - vour answers in the spaces provided. 3 3 3five 2 0 4fiveAnswer2 7 8 4nine 3 4 6nine
Using the expanded algorithm, add the following numbers. Show your work Place - vour answers in the spaces provided. 3 3 3five 2 0 4five Answer 2 7 8 4nine 3 4 6nine...
5 answers
Question 8. (4 MARKS) Prove A - (Vz)BF (HVz)(A - B)_ Hint. It is recommended that you use Axiom 2 (in its "simple form' early on in your proof:
Question 8. (4 MARKS) Prove A - (Vz)BF (HVz)(A - B)_ Hint. It is recommended that you use Axiom 2 (in its "simple form' early on in your proof:...
5 answers
7 , Explain how 4 comparison of concordance in monozygotic and dizygotic twins can be used to determine the extent to which the expression of a trait i$ intluenced by genes or by environmental #ctors
7 , Explain how 4 comparison of concordance in monozygotic and dizygotic twins can be used to determine the extent to which the expression of a trait i$ intluenced by genes or by environmental #ctors...
5 answers
Put II. Find lkx DE for th gnc HJmnily 0xcuncs Skctch rcprescnt)tne Hmlly of cunt Allcirkswhoxccltan Ic xt thx orlgin Fxtritky &llncs #kox slpe JN Unecttcc Jccual Alldee Fune Famtky oflinc Rhn throuyh (-2,0}. FmikalnraholrhulNecietCnko thc orlyln Jr faxas on tkky-Jxls
Put II. Find lkx DE for th gnc HJmnily 0xcuncs Skctch rcprescnt)tne Hmlly of cunt Allcirkswhoxccltan Ic xt thx orlgin Fxtritky &llncs #kox slpe JN Unecttcc Jccual Alldee Fune Famtky oflinc Rhn throuyh (-2,0}. FmikalnraholrhulNecietCnko thc orlyln Jr faxas on tkky-Jxls...
5 answers
Which of the following in terms of lonizing and penetration power; Is most Ilke a beta particle}gmnmu Nyposltronallare vory slmllarolpha particle
Which of the following in terms of lonizing and penetration power; Is most Ilke a beta particle} gmnmu Ny posltron allare vory slmllar olpha particle...
5 answers
X-u 2. Define statistic T and let n = 9. SIvn 4) Find number € such that P(-c < T < c) = 0.95. b) Using the value C you found in a), solve the inequality ~c < T < c for /, i.e. solve the inequality so that U is in the middle:
X-u 2. Define statistic T and let n = 9. SIvn 4) Find number € such that P(-c < T < c) = 0.95. b) Using the value C you found in a), solve the inequality ~c < T < c for /, i.e. solve the inequality so that U is in the middle:...
5 answers
Optimize the function y = 3xz Txs X1Xz + 6x2 4x2 + 2x2X3 + 4x3 + 2x3 3x1X3 - Use linear algebra techniques to solve the first-order condition and the Hessian for the second-order condition.5
Optimize the function y = 3xz Txs X1Xz + 6x2 4x2 + 2x2X3 + 4x3 + 2x3 3x1X3 - Use linear algebra techniques to solve the first-order condition and the Hessian for the second-order condition. 5...
5 answers
Suppose that the total number units produced by worker nours P(t) (a) Find the number hours before production Maximized.hour shift can be modcled by the production function At).(b) Find tho numberhours before the rate production Iemnan Thatfind the point diminishing returns.
Suppose that the total number units produced by worker nours P(t) (a) Find the number hours before production Maximized. hour shift can be modcled by the production function At). (b) Find tho number hours before the rate production Iemnan That find the point diminishing returns....
5 answers
To pass a course a Student must have at least a 60 average after three exams, but the last test counts as 2 since it's the final. Someone with scores of 47 and 72 on the first two regular tests needs what scores On the final t0 pass the course?
To pass a course a Student must have at least a 60 average after three exams, but the last test counts as 2 since it's the final. Someone with scores of 47 and 72 on the first two regular tests needs what scores On the final t0 pass the course?...
5 answers
(8) Change the following integral to cylindrical coordinates. Do not evaluate the integral Fx~ 4-4(22+y2) f (22 +y2 + 1)dzdxdy IVi-zz (22+y2)2_1
(8) Change the following integral to cylindrical coordinates. Do not evaluate the integral Fx~ 4-4(22+y2) f (22 +y2 + 1)dzdxdy IVi-zz (22+y2)2_1...
5 answers
A particle (mass = 6.7× 10−27 kg,charge = 3.2 × 10−19C) moves along thepositive x axis with a speed of 3.6 × 105 m/s. It enters a region ofuniform electric field parallel to its motion and comes to restafter moving 1.5 m into the field. What is the magnitudeof the electric field? [Note: K =[Note: K = 0.5mv2]
A particle (mass = 6.7× 10−27 kg, charge = 3.2 × 10−19C) moves along the positive x axis with a speed of 3.6 × 105 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 1.5 m into the field. What is the magnitude of the elect...
5 answers
As members of the detritus food web (i.e-, a trophic web that is based on the consumption of dead organic material) feed on cOw manure which of the following is released as a result of their activity?Select one:Gluecose and oxygen b. Water and oxygen Only carbon dioxideHeat and glucose Carbon dioxide water; and heat
As members of the detritus food web (i.e-, a trophic web that is based on the consumption of dead organic material) feed on cOw manure which of the following is released as a result of their activity? Select one: Gluecose and oxygen b. Water and oxygen Only carbon dioxide Heat and glucose Carbon dio...
5 answers
[Spts] Use Cramer' rule to solve thc following system of equations: (Show your work 50 that it's clear Uhut YOu used Cramer' $ nile. ) {x+= 4y = 8y = 11 Ibx Joo 4vi 40 +6% = Io7 35 _8 Dl I0s Su +44 = IOD |n | Apal 4t 55 + |i9 = 64 os 07 Dl Jeal 3 4 Je 5 [6pts] Find non-trivial way l0 write the column matrix B = WS 0 linear combination of the columns 5f
[Spts] Use Cramer' rule to solve thc following system of equations: (Show your work 50 that it's clear Uhut YOu used Cramer' $ nile. ) {x+= 4y = 8y = 11 Ibx Joo 4vi 40 +6% = Io7 35 _8 Dl I0s Su +44 = IOD |n | Apal 4t 55 + |i9 = 64 os 07 Dl Jeal 3 4 Je 5 [6pts] Find non-trivial way l0 ...

-- 0.061066--