Inclusion Probabilities: Stratified Random Sampling
Inclusion Probabilities: Stratified Random Sampling
strata_rs_probabilities(strata = NULL, prob = NULL, prob_unit = NULL, n = NULL, n_unit = NULL, strata_n = NULL, strata_prob = NULL, check_inputs = TRUE)
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.
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)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.