Identifying Variables in a Research Study
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Questions and Answers

What is a variable in a study?

  • The sample size chosen for the study
  • A certain attribute of the population (correct)
  • The research problem being investigated
  • The timeframe in which the study is conducted

How can you identify the variables of a study?

  • By understanding the research problem
  • By questioning what information is needed from each subject (correct)
  • By determining the sample size needed
  • By analyzing the study's objectives

What could happen if variables are not identified early in a study?

  • Missing important information in the instrument formulation (correct)
  • Improved clarity in defining the population
  • Increased focus on the research problem
  • Enhanced accuracy in data collection

In the example provided, what was the population of the study?

<p>All USLS BStat students for a specific semester (B)</p> Signup and view all the answers

If 'BStat' was omitted from the study description, how would it affect the population's scope?

<p>It would narrow the scope to a different course (A)</p> Signup and view all the answers

Why is it important to identify variables for each stated specific objective?

<p>To ensure no crucial information is overlooked (C)</p> Signup and view all the answers

What is a key characteristic of the nominal scale of measurement?

<p>Categories are mutually exclusive (A)</p> Signup and view all the answers

Which operation cannot be applied to numbers in the nominal scale?

<p>Comparison (C)</p> Signup and view all the answers

Why can't you find the 'average sex' using numbers in the nominal scale?

<p>Numbers do not have numeric properties (A)</p> Signup and view all the answers

In the nominal scale, what does assigning the number 2 to Female imply?

<p>'Female' is better than 'Male' (A)</p> Signup and view all the answers

What does it mean for categories to be exhaustive in the nominal scale?

<p>There must be enough categories for all observations (B)</p> Signup and view all the answers

Why is it important that numbers in the nominal scale do not duplicate?

<p>Duplicates violate the mutually exclusive property of categories (D)</p> Signup and view all the answers

What is the main difference between categories and levels?

<p>Levels have an intrinsic order, while categories do not. (D)</p> Signup and view all the answers

Which characteristic ensures that respondents provide only one answer?

<p>Mutually exclusive (C)</p> Signup and view all the answers

What is the purpose of using 'Others, please specify' in the categories?

<p>To include all possibilities, especially those with low frequencies (C)</p> Signup and view all the answers

Which variable type has values that can be measured and manipulated?

<p>Continuous (B)</p> Signup and view all the answers

In terms of quantitative variables, what forms attributes?

<p>Counts or measurements (D)</p> Signup and view all the answers

Why is it important for categories to be exhaustive in a survey?

<p>To cover all possible answers, especially those with low frequencies (C)</p> Signup and view all the answers

What does a score of 0 on a test imply?

<p>Complete absence of knowledge gained by a student (C)</p> Signup and view all the answers

Which scale possesses all the characteristics of the interval scale and has a true or absolute zero point?

<p>Ratio Scale (D)</p> Signup and view all the answers

Why is Ratio Scale considered the most informative scale?

<p>It provides information about the order and number of objects between values (A)</p> Signup and view all the answers

Which example best represents ratio data according to the text?

<p>Height and weight (C)</p> Signup and view all the answers

Why is it relevant to say 'one object has twice the length of the other' in ratio scale data?

<p>Because ratio data has a true zero point (D)</p> Signup and view all the answers

What type of variables generate either interval or ratio scale data?

<p><strong>Quantitative</strong> variables (A)</p> Signup and view all the answers

Which scale of measurement indicates the direction of difference?

<p>Ordinal (B)</p> Signup and view all the answers

In the context of scales of measurement, which one meets all four properties?

<p>Ratio (D)</p> Signup and view all the answers

Which variable is qualitative?

<p>Ratio of current assets to current liabilities (B)</p> Signup and view all the answers

What type of variable is 'Brand of jeans you prefer'?

<p>Qualitative (B)</p> Signup and view all the answers

Which example represents a sample rather than a population?

<p>A group of 25 customers selected to taste a new soft drink (A)</p> Signup and view all the answers

What type of variable is 'Number of text messages received per day'?

<p>Quantitative discrete (A)</p> Signup and view all the answers

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