Module 2 Quiz Flashcards
When assessing inter-rater reliability, researchers are primarily concerned with:
How well different raters agree with each other
Temperature measured in Fahrenheit is an example of which measurement scale?
Interval
What is the key difference between a population parameter and a sample statistic?
Parameters describe the entire population while statistics describe samples
Which level of measurement is being used when students rank their top 3 college choices in order of preference?
Ordinal
What type of validity is being assessed when comparing a new measure of anxiety with an established measure of anxiety?
Convergent validity
Which type of graph is most appropriate for showing the distribution of continuous numerical data?
Histogram
What is the primary advantage of a frequency polygon over a histogram?
It’s better for comparing multiple distributions
When is it appropriate to start the Y-axis at a value other than zero?
When showing changes in values that never approach zero
In a distribution with positive skew:
The mean is greater than the median
Which of the following is a major problem with pie charts?
They make it difficult to accurately compare proportions
What is the primary difference between descriptive and inferential statistics?
Descriptive statistics summarize data while inferential statistics draw conclusions about populations
A researcher measures participants’ height, weight, and shoe size. These measurements are all examples of:
Ratio scales
In a stem and leaf plot, what does the “stem” represent?
The leading digit(s) of each number
Which graphical element should be avoided according to the chapter?
Three-dimensional effects
What is the main purpose of a box plot?
To summarize the distribution of data using quartiles
