two_arm_designer {DesignLibrary} R Documentation

## Create a one-level two-arm design

### Description

Builds a design with one treatment and one control arm. Treatment effects can be specified either by providing control_mean and treatment_mean or by specifying a control_mean and ate.

### Usage

two_arm_designer(
N = 100,
assignment_prob = 0.5,
control_mean = 0,
control_sd = 1,
ate = 1,
treatment_mean = control_mean + ate,
treatment_sd = control_sd,
rho = 1,
args_to_fix = NULL
)


### Arguments

 N An integer. Sample size. assignment_prob A number in [0,1]. Probability of assignment to treatment. control_mean A number. Average outcome in control. control_sd A positive number. Standard deviation in control. ate A number. Average treatment effect. treatment_mean A number. Average outcome in treatment. Overrides ate if both specified. treatment_sd A nonnegative number. Standard deviation in treatment. By default equals control_sd. rho A number in [-1,1]. Correlation between treatment and control outcomes. args_to_fix A character vector. Names of arguments to be args_to_fix in design.

### Details

Units are assigned to treatment using complete random assignment. Potential outcomes are normally distributed according to the mean and sd arguments.

### Value

A simple two-arm design.

### Examples

# Generate a simple two-arm design using default arguments
two_arm_design <- two_arm_designer()


[Package DesignLibrary version 0.1.10 Index]