hypothesis function

Hypothesis wrapper

Wrapper function for the hypothesis in the trial.

hypothesis(
  delta = 0,
  futility_prob = 0.05,
  prob_accept_ha = 0.95,
  expected_success_prob = 0.9,
  alternative = "greater",
  .data = NULL
)

Arguments

• delta: numeric. Threshold set for margin in null hypothesis. The default is set to 0.
• futility_prob: numeric. Probability of futility. The default is 0.05.
• prob_accept_ha: numeric. Posterior probability of accepting alternative hypothesis. The default is 0.95.
• expected_success_prob: numeric. Probability of expected success.
• alternative: character. The string specifying the alternative hypothesis, must be one of "greater" (default), "less" or "two.sided".
• .data: NULL. This should not be changed by the user.

Returns

a list with information of hypothesis testing (threshold, futility probability, probability of accepting the alternative hypothesis, and probability of expected success).

Examples

hypothesis(delta = 0, futility_prob = 0.05, prob_accept_ha = 0.95,
           expected_success_prob = 0.90, alternative = "greater")
hypothesis(delta= 0.2, futility_prob = 0.1, prob_accept_ha = 0.975,
           expected_success_prob = 0.80, alternative = "less")