Sampling Bias IELTS Reading Answers

Updated On Apr 20, 2021

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1 Sampling Bias
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The Academic passage ‘Sampling Bias’ is a reading passage that appeared in an IELTS Test. Read the passage below and answer questions 14 – 26. Beyond the questions, you will find the answers along with the location of the answers in the passage and the keywords that help you find out the answers.

Sampling Bias

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Sampling Bias - 0002

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Sampling Bias - 0005

Sampling Bias - 0006

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Question number	Answer	Keywords	Location of keywords
14	NOT GIVEN	–	–
15	TRUE	Surveys, for example, are popular because they are easy to administer and relatively cost-effective, particularly if conducted remotely through technical means, such as telephone,	Paragraph B; Line 1
16	FALSE	Such surveys, however, have proven notoriously unreliable because of the difficulty in obtaining representative samples.	Paragraph B; Line 5
17	TRUE	Those that answer will more likely be the unemployed, disabled, elderly, and retired,	Paragraph C; Line 4
18	FALSE	This allows easy collation, analysis, and presentation of results, all with the air of precision that mathematics brings.	Paragraph B; Line 4
19	self-selection	One of the more subtle of sampling biases is known as self-selection.	Paragraph D; Line 1
20	Opinionated perspectives	opinionated perspectives are disproportionately represented.	Paragraph D; Last line
21	Maximise (the)	The latter is such an immediate and obvious problem that it has given rise to techniques to maximise the possibility of garnering responses.	Paragraph E; Line 1
22	Sufficiently trained	The interviewers themselves must be sufficiently trained in correct question-asking techniques,	Paragraph E; Last line
23	introduction	interviewers must provide introductions about themselves, their company, and the nature of the interview, fully and with evident sincerity,	Paragraph E; Last line
24	trust	interviewers must provide introductions about themselves, their company, and the nature of the interview, fully and with evident sincerity, in order to gain the trust of those they are talking to.	Paragraph E; Last line
25	B	Even with this, sampling bias can easily arise due to the number of variables in place, since it only takes one to skew the data.	Paragraph F; Line 1
26	C	mathematical extrapolations to correct the bias. For this to work, the degree of underrepresentation needs to be quantified exactly,	Paragraph G; Lines 1- 2

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