30 Questions
What is a variable in a study?
A certain attribute of the population
How can you identify the variables of a study?
By questioning what information is needed from each subject
What could happen if variables are not identified early in a study?
Missing important information in the instrument formulation
In the example provided, what was the population of the study?
All USLS BStat students for a specific semester
If 'BStat' was omitted from the study description, how would it affect the population's scope?
It would narrow the scope to a different course
Why is it important to identify variables for each stated specific objective?
To ensure no crucial information is overlooked
What is a key characteristic of the nominal scale of measurement?
Categories are mutually exclusive
Which operation cannot be applied to numbers in the nominal scale?
Comparison
Why can't you find the 'average sex' using numbers in the nominal scale?
Numbers do not have numeric properties
In the nominal scale, what does assigning the number 2 to Female imply?
'Female' is better than 'Male'
What does it mean for categories to be exhaustive in the nominal scale?
There must be enough categories for all observations
Why is it important that numbers in the nominal scale do not duplicate?
Duplicates violate the mutually exclusive property of categories
What is the main difference between categories and levels?
Levels have an intrinsic order, while categories do not.
Which characteristic ensures that respondents provide only one answer?
Mutually exclusive
What is the purpose of using 'Others, please specify' in the categories?
To include all possibilities, especially those with low frequencies
Which variable type has values that can be measured and manipulated?
Continuous
In terms of quantitative variables, what forms attributes?
Counts or measurements
Why is it important for categories to be exhaustive in a survey?
To cover all possible answers, especially those with low frequencies
What does a score of 0 on a test imply?
Complete absence of knowledge gained by a student
Which scale possesses all the characteristics of the interval scale and has a true or absolute zero point?
Ratio Scale
Why is Ratio Scale considered the most informative scale?
It provides information about the order and number of objects between values
Which example best represents ratio data according to the text?
Height and weight
Why is it relevant to say 'one object has twice the length of the other' in ratio scale data?
Because ratio data has a true zero point
What type of variables generate either interval or ratio scale data?
Quantitative variables
Which scale of measurement indicates the direction of difference?
Ordinal
In the context of scales of measurement, which one meets all four properties?
Ratio
Which variable is qualitative?
Ratio of current assets to current liabilities
What type of variable is 'Brand of jeans you prefer'?
Qualitative
Which example represents a sample rather than a population?
A group of 25 customers selected to taste a new soft drink
What type of variable is 'Number of text messages received per day'?
Quantitative discrete
Learn how to identify the variable or measurable characteristic of a subject that is the focus of a research study. Understand the importance of variables in research and how they contribute to answering the research problem.
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