create standard scores — standard_score • psycheval

computes confidence intervals, percentiles

Usage

standard_score(
  .data = numeric(0),
  mu = 100L,
  sigma = 15,
  rxx = 0.9,
  ci_level = 0.95,
  accuracy = 1
)

Arguments

.data: obtained score
mu: population mean
sigma: population standard deviation
rxx: reliability coefficient
ci_level: confidence level
accuracy: rounding accuracy

Slots

estimated_true_score: estimated true score
standard_error_of_measurement: standard error of measurement
standard_error_of_estimation: standard error of estimation
margin_of_error: margin of error
z: z-score associated with ci_level
ci_lower_bound: lower bound of CI
ci_upper_bound: upper bound of CI
ci: CI as a range
percentile: percentile

Examples

x <- standard_score(140, rxx = .97)
x@ci
#> [1] "134—144"
x@percentile
#> Error in loadNamespace(x): there is no package called ‘WJSmisc’
x@estimated_true_score
#> [1] 138.8