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Psychological Statistics

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A random selection of files from a student counseling center revealed the following reasons why college students seek services:

Mental health issues

Learning/school issues

Relationship issues


What does it mean to say the files were randomly selected?
How would the researcher randomly select files? In other words, what does the process look like?
What is the probability that if we pulled another student file from the counseling center the student would fall in each of the following categories a) mental health issues, b) learning/school issues OR relationship issues, c) any category except other?
Would our probabilities and results be different if we used convenience sampling? Why or why not?

  • Psychological Statistics -

    The only way to randomly select is to use a random number generator. Any other method is suspect.

    Pr(mental)=25/(50) and so on.

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