Description Usage Arguments Value Examples

Inclusion Probabilities: Stratified Random Sampling

1 2 3 |

`strata` |
A vector of length N that indicates which stratum each unit belongs to. Can be a character, factor, or numeric vector. (required) |

`prob` |
Use for a design in which either floor(N_stratum*prob) or ceiling(N_stratum*prob) units are sampled within each stratum. The probability of being sampled is exactly prob because with probability 1-prob, floor(N_stratum*prob) units will be sampled and with probability prob, ceiling(N_stratum*prob) units will be sampled. prob must be a real number between 0 and 1 inclusive. (optional) |

`prob_unit` |
Must of be of length N. tapply(prob_unit, strata, unique) will be passed to |

`n` |
Use for a design in which the scalar n describes the fixed number of units to sample in each stratum. This number does not vary across strata. |

`n_unit` |
Must be of length N. tapply(m_unit, strata, unique) will be passed to |

`strata_n` |
Use for a design in which the numeric vector strata_n describes the number of units to sample within each stratum. |

`strata_prob` |
Use for a design in which strata_prob describes the probability of being sampled within each stratum. Differs from prob in that the probability of being sampled can vary across strata. |

`check_inputs` |
logical. Defaults to TRUE. |

A vector length N indicating the probability of being sampled.

1 2 3 4 5 6 7 8 9 10 11 12 | ```
strata <- rep(c("A", "B","C"), times = c(50, 100, 200))
probs <- strata_rs_probabilities(strata = strata)
table(strata, probs)
probs <- strata_rs_probabilities(strata = strata, prob = .2)
table(strata, probs)
probs <- strata_rs_probabilities(strata = strata, strata_prob = c(.1, .2, .3))
table(strata, probs)
probs <- strata_rs_probabilities(strata = strata, strata_n = c(10, 40, 70))
table(strata, probs)
``` |

DeclareDesign/randomizr documentation built on Dec. 7, 2018, 5:10 p.m.

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.