Research Sampling Methods Quiz

2.

Which of the following pairs correctly describe the type of data and its method?

BMI in groups : Histogram
Age groups : Box plots.
BMI in kg/m² by gender : Mean and SD by gender
Age in years : Frequency distribution

Correct Answer

A. BMI in kg/m² by gender : Mean and SD by gender

Explanation

The correct answer is BMI in kg/m2 by gender: Mean and SD by gender. This is because BMI is a continuous variable that can be measured in kg/m2, and when analyzing this data by gender, the appropriate method would be to calculate the mean and standard deviation to understand the average and variability of BMI within each gender group.

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3.

Which of the following is the best example of categorical value?

Number of episodes of disease in a patient over a year.
Reduction in blood pressure following antihypertensive treatment.
Serum bilirubin level (mmol/L).
Severity of haemophilia (mild/moderate/severe).

Correct Answer

A. Severity of haemophilia (mild/moderate/severe).

Explanation

The best example of a categorical value is the severity of haemophilia, which is categorized as mild, moderate, or severe. This is because it represents different levels or categories of a specific attribute or characteristic. The other options, such as the number of episodes of a disease, reduction in blood pressure, and serum bilirubin level, are quantitative measures rather than categorical values.

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4.

Which can be the most reliable source of information for the literature review?

A relevant chapter from a textbook
A TV documentary
A peer reviewed research article
A newspaper article

Correct Answer

A. A peer reviewed research article

Explanation

A peer reviewed research article is the most reliable source of information for a literature review because it undergoes a rigorous evaluation process by experts in the field before being published. This ensures that the information presented is accurate, credible, and based on sound research methods. TV documentaries and newspaper articles may provide some information, but they are often less reliable as they may be biased or lack the same level of scrutiny. A relevant chapter from a textbook can be a good source, but it may not always contain the most up-to-date information compared to peer-reviewed research articles.

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5.

What is the criteria for a SMART goal?

Specific, measurable, achievable, relevant, time-bound
Specific, measurable, appropriate, reliable, time-bound
Simple, measurable, attainable, relevant, testable
Simple, measurable, appropriate, relevant, testable

Correct Answer

A. Specific, measurable, achievable, relevant, time-bound

Explanation

The criteria for a SMART goal are specific, measurable, achievable, relevant, and time-bound. This means that a goal should be clear and well-defined, have a way to measure progress and success, be realistic and attainable, align with the overall objectives and priorities, and have a deadline or timeframe for completion.

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6.

What does the null hypothesis in the chi-square test states?

The rows and columns in the table are associated
Neither of the two
The rows and columns in the table are not associated
Either of the two

Correct Answer

A. The rows and columns in the table are not associated

Explanation

The null hypothesis in the chi-square test states that there is no association between the rows and columns in the table. This means that the variables being compared are independent of each other and any observed association is due to chance.

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7.

Which of the following is NOT a reason for evaluating a questionnaire?

To see if the questions are understood by the target population
If the first five respondents fill in the questionnaire well you may not need to undertake a study with more people
To help you decide on the best way to analyse the data
To check that the responses you receive are what you need to answer your research question

Correct Answer

A. If the first five respondents fill in the questionnaire well you may not need to undertake a study with more people

Explanation

The given answer is not a reason for evaluating a questionnaire because the number of respondents who fill in the questionnaire well does not determine the need for a larger study. Evaluation of a questionnaire is done to ensure that the questions are understood by the target population, to check if the responses align with the research question, and to determine the best way to analyze the collected data.

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8.

Which of the following describes the type I error in hypothesis testing?

Can be reduced by increasing power
False negative
Reject a true null hypothesis
Failed to reject a false null hypothesis

Correct Answer

A. Reject a true null hypothesis

Explanation

The type I error in hypothesis testing occurs when a true null hypothesis is incorrectly rejected. This means that the test incorrectly concludes that there is a significant difference or effect when there actually isn't. It is also known as a "false positive" or a "false discovery". Type I error is controlled by setting the significance level (alpha) of the test, and it represents the probability of rejecting a true null hypothesis. Increasing the power of the test can help reduce the likelihood of committing a type I error.

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9.

Which of the following can be used for the analysis of mean differences in systolic blood pressure of male and female?

Paired t-test
Independent t-test
One sample t-test
One-way analysis of variance (ANOVA)

Correct Answer

A. Independent t-test

Explanation

The independent t-test can be used for the analysis of mean differences in systolic blood pressure of male and female. This test is appropriate when comparing the means of two independent groups, in this case, males and females. It determines whether there is a significant difference between the means of the two groups, indicating whether there is a significant difference in systolic blood pressure between males and females.

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10.

Which of the following statements is TRUE about sampling method?

Probability sampling is every potential subject has equal chance of being chosen
Random selection is used in quota sampling.
Non probability sampling is a sampling method that allows to draw valid conclusions about population
Stratified sampling does not use the random selection.

Correct Answer

A. Probability sampling is every potential subject has equal chance of being chosen

Explanation

Probability sampling is a sampling method in which every potential subject in the population has an equal chance of being chosen. This means that each individual in the population has an equal probability of being selected as a sample. This method ensures that the sample is representative of the population, allowing for valid conclusions to be drawn about the entire population based on the sample.

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Research Sampling Methods Quiz

Which of the following is not an advantage of Snowball Sampling?

Quiz Preview

Which of the following pairs correctly describe the type of data and its method?

Which of the following is the best example of categorical value?

Which can be the most reliable source of information for the literature review?

What is the criteria for a SMART goal?

What does the null hypothesis in the chi-square test states?

Which of the following is NOT a reason for evaluating a questionnaire?

Which of the following describes the type I error in hypothesis testing?

Which of the following can be used for the analysis of mean differences in systolic blood pressure of male and female?

Which of the following statements is TRUE about sampling method?