Mastering Basic Statistics
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Questions and Answers

Which day and time is the lecture for the course PSYC 3910: Advanced Data Analysis?

  • Thursday 9:30 am – 11:00 am (correct)
  • Tuesday 9:40-11:00 am
  • Friday 2:30-3:30 pm
  • Monday 2:10-3:30 pm

Where are the tutorials for session 45684 held?

  • Room DTB205
  • Room DTB205 and Room CHA217
  • Room CHA213 (correct)
  • Room CHA217

Who is the instructor for the course PSYC 3910: Advanced Data Analysis?

  • Field, A., Miles, J., & Field, Z.
  • Bordessa Hall
  • Bobby Stojanoski (correct)
  • Guadalupe Blanco Velasco

Which function is used to plot a scatter plot in ggplot2?

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

What does the aes() function do in ggplot2?

<p>Scales the aesthetic based on the variable values (B)</p> Signup and view all the answers

Which function is used to create grouped bar plots in ggplot2?

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

How can you add error bars to a bar plot in ggplot2?

<p>Use the <code>stat_summary</code> function with <code>geom = 'errorbar'</code> (C)</p> Signup and view all the answers

Which of the following is a topic covered in Week 4?

<p>Fundamentals of GLM (C)</p> Signup and view all the answers

What percentage of the final grade is the midterm exam worth?

<p>25% (A)</p> Signup and view all the answers

What is the purpose of using statistics in psychology?

<p>To understand complicated human behavior (B)</p> Signup and view all the answers

What is Simpson's Paradox?

<p>A phenomenon where an association between two variables disappears when data is divided into subpopulations (C)</p> Signup and view all the answers

Which of the following is an example of a categorical variable?

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

What is the measure of central tendency that is not affected by outliers?

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

What does the interquartile range measure?

<p>The spread of data around the mean (B)</p> Signup and view all the answers

What does positive skew indicate in a frequency distribution?

<p>Scores are bunched at low values with the tail pointing to high values (B)</p> Signup and view all the answers

Which of the following statements about z-scores is true?

<p>Z-scores express a score in terms of how many standard deviations it is away from the mean. (A)</p> Signup and view all the answers

Which of the following statements about the normal distribution and z-scores is true?

<p>99.9% of z-scores lie between -3.29 and 3.29. (B)</p> Signup and view all the answers

What is the purpose of visualizations in data analysis?

<p>To show the data and facilitate relevant interpretation and comparisons. (A)</p> Signup and view all the answers

What is the role of aesthetics in ggplot2?

<p>Aesthetics define the visual properties of the objects in a plot, such as color, size, and shape. (C)</p> Signup and view all the answers

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