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assignment #1

Psychological Statistics @ SNU, 2013 Spring
Thursday, March 21, 13

QuantPsych

Questions
IQ is intended to be normally distributed with a mean of 100 and a standard deviation of 15

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Generate a data set of 400 imaginary subjects’ IQ Report the following descriptive statistics of the generated data set

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mean, variance, range, quartile scores, interquartile range Tip. summary() can be helpful

Draw a histogram and a box plot Based on the above analyses, how many data points of your data set can be regarded as outliers?

Psychological Statistics @ SNU, 2013 Spring
Thursday, March 21, 13

QuantPsych

Instructions
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Submit your report file as .pdf Submit the script file

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You can find the menu to save the script as a file on R program What is the “script”? It’s already explained by TA You can find the menu to save the workspace(“ ”) as a file on the program, too

Submit the workspace file

eTL system does not provide uploading multiple files Thus, you should compress the files mentioned above into a SINGLE file to upload

All the files (including compressed file) MUST be named as following e.g. 2000-99999_ .zip, 2000-99999_ .pdf

Psychological Statistics @ SNU, 2013 Spring
Thursday, March 21, 13

QuantPsych

Cautions
Any cheating is FUNDAMENTALLY prohibited

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Cheaters will get no marks for this assignment

Due date must be respected Otherwise, there will be no marks for this assignment NO excuses accepted (e.g., internet connection problem, frozen Windows)

Posting any relevant questions on eTL is NOT recommended For any help, refer to the PPT file by TA or use the default help system of R You can post questions BUT you may not get replied depending on their content

Psychological Statistics @ SNU, 2013 Spring
Thursday, March 21, 13

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