Introduction To Research - Test 2 | Attempts: 752

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| By Safa.marwan2000

Safa.marwan2000

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Quizzes Created: 4 | Total Attempts: 2,957

| Attempts: 752

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1/10 Questions

Prevalence is the number of new cases in a population.
- True
- False

About This Quiz

This quiz titled 'Introduction to Research - Test 2' assesses knowledge on epidemiological concepts such as prevalence, sensitivity, and specificity, using practical examples like HIV and dementia screening tests. It's designed for learners interested in medical research fundamentals.

2.

Sensitivity is the ability of a test to correctly identify those who have the disease, while specificity is its ability to identify those who don't have the disease.
- True
- False
Correct Answer

A. True

Explanation

This statement is true because sensitivity refers to the test's ability to correctly identify individuals who have the disease, meaning it has a low rate of false negatives. On the other hand, specificity refers to the test's ability to correctly identify individuals who do not have the disease, meaning it has a low rate of false positives. So, sensitivity and specificity are both important measures of a test's accuracy in diagnosing a disease.

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3.

The fecal immunochemical test is a screening test for colon cancer. If its specificity was 60% and its sensitivity was 80% and the negative predictive value was 25%. What is the prevalence of colon cancer?
- 0.9 (90%)
- 0.85 (85%)
- 0.8 (80%)
- 0.95 (95%)
Correct Answer

A. 0.9 (90%)

Explanation

Use Bayes' rule and solve for P(D).

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4.

HIV antibody conformation test is a screening test for AIDS. Based on the table below, what is the probability of getting a negative test if the person is infected? Test positive Test negative AIDS positive 420 90 AIDS negative 280 210
- 9/51
- 42/51
- 9/49
- 21/49
Correct Answer

A. 9/51

Explanation

Find the probability of getting a false negative test.

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5.

Verbal fluency test is a screening test used for dementia. Based on the table below, what is probability of getting a negative reult that is really negative? Dementia positive Dementia negative Positive test 640 100 Negative test 160 100
- 10/26
- 16/26
- 64/74
- 10/74
Correct Answer

A. 10/26

Explanation

Find the negative predicted value (NPV).

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6.

The largest collection of entities for which there is an interest at a particular time is:
- Population
- Sample
- Inference
- Statistic
Correct Answer

A. Population

Explanation

The largest collection of entities for which there is an interest at a particular time is referred to as the population. In statistics, a population is the entire group being studied, which can be individuals, objects, or events. It represents the complete set of elements that possess the characteristics of interest to the researcher. By studying the entire population, researchers aim to make generalizations and draw conclusions about the entire group, rather than just a subset or sample.

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7.

Permitting examination of past trends is an advantage of which data collection techniques?
- Using available information
- Observing
- Interviewing
- Adminstering written questionnairs
Correct Answer

A. Using available information

Explanation

Using available information allows for the examination of past trends because it involves gathering and analyzing existing data that has already been collected. This can include data from various sources such as research studies, surveys, reports, and databases. By utilizing available information, researchers can identify patterns, trends, and relationships over time, which can provide valuable insights and inform decision-making processes.

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8.

Time consuming is a disadvatage of which type of non-probablistic sampling?
- Judgment sampling
- Quota sampling
- Convenience sampling
- 2 of the answers are correct
Correct Answer

A. 2 of the answers are correct

Explanation

Both judgment sampling and quota sampling are time consuming.

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9.

An advantage of snowball sampling is that it is dependant
- True
- False
Correct Answer

A. False

Explanation

A disadvantage of snow ball sampling is that it is not independant (it is dependant).

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10.

Interviewing is a data collection method that is suitable for illiterate.
- True
- False
Correct Answer

A. True

Explanation

Interviewing is a data collection method that is suitable for illiterate individuals because it involves conducting face-to-face or verbal interviews, where the interviewer asks questions and records the responses provided by the interviewee. This method does not require reading or writing skills, making it accessible for illiterate individuals to participate and provide their answers orally.

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Current Version
Mar 21, 2023

Quiz Edited by
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May 05, 2020

Quiz Created by
Safa.marwan2000

Introduction To Research - Test 2

Prevalence is the number of new cases in a population.

Quiz Preview

Sensitivity is the ability of a test to correctly identify those who have the disease, while specificity is its ability to identify those who don't have the disease.

The fecal immunochemical test is a screening test for colon cancer. If its specificity was 60% and its sensitivity was 80% and the negative predictive value was 25%. What is the prevalence of colon cancer?

HIV antibody conformation test is a screening test for AIDS. Based on the table below, what is the probability of getting a negative test if the person is infected? Test positive Test negative AIDS positive 420 90 AIDS negative 280 210

Verbal fluency test is a screening test used for dementia. Based on the table below, what is probability of getting a negative reult that is really negative? Dementia positive Dementia negative Positive test 640 100 Negative test 160 100

The largest collection of entities for which there is an interest at a particular time is:

Permitting examination of past trends is an advantage of which data collection techniques?

Time consuming is a disadvatage of which type of non-probablistic sampling?

An advantage of snowball sampling is that it is dependant

Interviewing is a data collection method that is suitable for illiterate.