The following is easier than the steps in Section 3.2:

1. Start as in Step 1 on p. 34: Enter r

2. To randomize, choose Random Data from the Calc menu, then Sample from Columns. Enter the total number of observations desired (n = sum of the r

obs | treat | randtr |

1 | 1 | 1 |

2 | 1 | 3 |

3 | 2 | 1 |

4 | 2 | 3 |

5 | 3 | 3 |

6 | 3 | 2 |

7 | 3 | 2 |

(I have added a column "obs" for convenience.) This says assign experimental units 1 and 3 (first column) to treatment 1 (last column), units 6 and 7 to treatment 2, and units 2, 4, and 5 to treatment 3. (Note that the second column was just an intermediate step.)