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statpsych 1.9

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@rcalinjageman rcalinjageman released this 14 Jan 15:58
· 59 commits to main since this release
1.9
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Learn about vigilant mode.

statpsych version 1.9.0 (Release date: 2026/01/01)

Changes:

  • New functions:
    • size.ci.sd -- Computes sample size for a traditional standard deviation confidence interval
    • size.ci.cronbach.prior -- Computes sample size for a Cronbach reliablity confidence interval using a planning value from a prior study
    • size.ci.icc.prior -- Computes sample size for an intraclass correlation confidence interval using a planning value from a prior study
    • size.ci.icc -- Computes sample size for an intraclass correlation confidence interval
    • ci.diversity -- Computes estimates and confidence intervals for three types of diversity indices
    • ci.mean.gen -- Computes confidence intervals for three types of generalized means
    • ci.sd -- Computes the traditional confidence interval for a population standard deviation
    • ci.lc.prop.scheffe -- Computes a Scheffe confidence interval and p-value for a linear contrast of population proportions
    • ci.lc.mean.scheffe -- Computes a Scheffe confidence interval and p-value for a linear contrast of population means
    • ci.icc -- Computes intraclass reliability coefficients using mean square estimates as input
    • ci.slope -- Computes confidence interval for slope in a simple linear model using summary statistics as input
    • pi.cronbach -- Computes a prediction interval for a Cronbach reliability in a future sample
  • References Manual
    • Most function descriptions now refer to a specific section in the Bonett (2021) online text for additional details
  • Error Corrections:
    • size.ci.prop.prior -- corrected a error in the sample size computation
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