Digit counts


Digits from social security numbers and student selected random numbers


A data frame with 150 observations on the following 7 variables.

  • Random Four digit random numbers picked by a sample of students

  • RND1 First digit

  • RND2 Second digit

  • RND3 Third digit

  • RND4 Fourth digit

  • SSN8 Eighth digit of social security number

  • SSN9 Last digit of social security number


A sample of students were asked to pick a random four digit number. The numbers are given in the dataset, along with separate columns for each of the four digits. The data also show the last two digits of each student's social security number (SSN).


In class-student surveys from several classes.



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