pi.score: Prediction interval for one score

In statpsych: Statistical Methods for Psychologists

Prediction interval for one score

Description

Computes a prediction interval for the response variable score of one randomly selected member from the study population.

For more details, see Section 1.9 of Bonett (2021, Volume 1)

Usage

pi.score(alpha, m, sd, n)

Arguments

alpha	alpha level for 1-alpha confidence
m	estimated mean
sd	estimated standard deviation
n	sample size

Value

Returns a 1-row matrix. The columns are:

• Predicted - predicted score

• df - degrees of freedom

• LL - lower limit of the prediction interval

• UL - upper limit of the prediction interval

References

\insertRef

Bonett2021statpsych

Examples

pi.score(.05, 24.5, 3.65, 40)

# Should return:
# Predicted  df       LL       UL
#      24.5  39 17.02546 31.97454
 

statpsych documentation built on Jan. 13, 2026, 1:07 a.m.