CI_smd_one {esci} | R Documentation |
Estimate standardized mean difference (Cohen's d1) for a single group
Description
CI_smd_one
STILL NEEDS WORK TO VERIFY APPROACH FOR SE and MoE
Usage
CI_smd_one(mean, sd, n, reference_mean, conf_level = 0.95, correct_bias = TRUE)
Arguments
mean |
Mean for a single group for the outcome measure |
sd |
Standard deviation, > 0 |
n |
Sample size, an integer > 2 |
reference_mean |
defaults to 0 |
conf_level |
The confidence level for the confidence interval, in decimal form. Defaults to 0.95. |
correct_bias |
Defaults to TRUE |
Value
Returns a list with these named elements:
effect_size - the point estimate from the sample
lower - lower bound of the CI
upper - upper bound of the CI
numerator - the numerator for Cohen's d_biased; the mean difference in the contrast
denominator - the denominator for Cohen's d_biased; if equal variance is assumed this is sd_pooled, otherwise sd_avg
df - the degrees of freedom used for correction and CI calculation
se - the standard error of the estimate; warning not totally sure about this yet
moe - margin of error; 1/2 length of the CI
d_biased - Cohen's d without correction applied
properties - a list of properties for the result
Properties
effect_size_name - if equal variance assumed d_s, otherwise d_avg
effect_size_name_html - html representation of d_name
denominator_name - if equal variance assumed sd_pooled otherwise sd_avg
denominator_name_html - html representation of denominator name
bias_corrected - TRUE/FALSE if bias correction was applied
message - a message explaining denominator and correction status
message_html - html representation of message
Examples
# example code
res <- esci::CI_smd_one(24.5, 3.65, 40, 20)