welch_res

A dataset containing simulation results from a study comparing Welch t-test to the conventional t-test.

datasets

Calculates performance criteria measures and associated Monte Carlo standard errors for simulation results. Includes functions to help run simulation studies, following a general simulation workflow that closely aligns with the approach described by Morris, White, and Crowther (2019) <DOI:10.1002/sim.8086>. Also includes functions for calculating bootstrap confidence intervals (including normal, basic, studentized, percentile, bias-corrected, and bias-corrected-and-accelerated) with tidy output, as well as for extrapolating confidence interval coverage rates and hypothesis test rejection rates following techniques suggested by Boos and Zhang (2000) <DOI:10.1080/01621459.2000.10474226>.

Megha Joshi

simhelpers

Helper Functions for Simulation Studies

James Pustejovsky

welch_res function

A tibble with 16,000 rows and 11 variables:<dl>
 <dt>n1</dt>
<dd>sample size for Group 1.</dd> <dt>n2</dt>
<dd>sample size for Group 2.</dd> <dt>mean_diff</dt>
<dd>true difference in means of two groups used to generate the data.</dd> <dt>iterations</dt>
<dd>number of iterations.</dd> <dt>seed</dt>
<dd>seed used to generate data.</dd> <dt>method</dt>
<dd>indicates whether Welch or conventional t-test was used.</dd> <dt>est</dt>
<dd>estimate of the mean difference.</dd> <dt>var</dt>
<dd>variance of the estimate.</dd> <dt>p_val</dt>
<dd>p-value from the t-test.</dd> <dt>lower_bound</dt>
<dd>lower bound of the confidence interval.</dd> <dt>upper_bound</dt>
<dd>upper bound of the confidence interval.</dd></dl>

Format

Welch t-test simulation results — welch_res

A tibble with 16,000 rows and 11 variables:<dl>
 <dt>n1</dt>
<dd>sample size for Group 1.</dd>

 <dt>n2</dt>
<dd>sample size for Group 2.</dd>

 <dt>mean_diff</dt>
<dd>true difference in means of two groups used to generate the data.</dd>

 <dt>iterations</dt>
<dd>number of iterations.</dd>

 <dt>seed</dt>
<dd>seed used to generate data.</dd>

 <dt>method</dt>
<dd>indicates whether Welch or conventional t-test was used.</dd>

 <dt>est</dt>
<dd>estimate of the mean difference.</dd>

 <dt>var</dt>
<dd>variance of the estimate.</dd>

 <dt>p_val</dt>
<dd>p-value from the t-test.</dd>

 <dt>lower_bound</dt>
<dd>lower bound of the confidence interval.</dd>

 <dt>upper_bound</dt>
<dd>upper bound of the confidence interval.</dd>



</dl>

welch_res: Welch t-test simulation results

Description

Usage

Arguments

Format