bonettseier.var.test.default: no visible global function definition for
  'complete.cases'
bonettseier.var.test.default: no visible global function definition for
  'median'
bonettseier.var.test.default: no visible global function definition for
  'sd'
bonettseier.var.test.default: no visible global function definition for
  'cor'
bonettseier.var.test.default: no visible global function definition for
  'qnorm'
bonettseier.var.test.default: no visible global function definition for
  'pnorm'
grambsch.var.test.default: no visible global function definition for
  'complete.cases'
grambsch.var.test.default: no visible global function definition for
  'sd'
grambsch.var.test.default: no visible global function definition for
  'pnorm'
imam.var.test.default: no visible global function definition for
  'median'
imam.var.test.default: no visible global function definition for
  't.test'
levene.var.test.default: no visible global function definition for
  'median'
levene.var.test.default: no visible global function definition for
  't.test'
mcculloch.var.test.default: no visible global function definition for
  'cor.test'
paired.effect.size: no visible global function definition for 'sd'
paired.plotMcNeil: no visible global function definition for 'reorder'
pitman.morgan.test.default: no visible global function definition for
  'complete.cases'
pitman.morgan.test.default: no visible global function definition for
  'cor'
pitman.morgan.test.default: no visible global function definition for
  'var'
pitman.morgan.test.default: no visible global function definition for
  'qt'
pitman.morgan.test.default: no visible global function definition for
  'pt'
rpaired.contaminated: no visible global function definition for 'pnorm'
rpaired.contaminated: no visible global function definition for
  'rbinom'
rpaired.contaminated: no visible global function definition for 'qnorm'
rpaired.gld: no visible global function definition for 'pnorm'
sandvikolsson.var.test.default: no visible global function definition
  for 'median'
sandvikolsson.var.test.default: no visible global function definition
  for 'wilcox.test'
summaryhelper: no visible global function definition for 'median'
summaryhelper: no visible global function definition for 'sd'
summaryhelper: no visible global function definition for 'IQR'
summaryhelper: no visible global function definition for 'mad'
var1.test: no visible global function definition for 'var'
var1.test: no visible global function definition for 'pchisq'
var1.test: no visible global function definition for 'qchisq'
var2.test: no visible global function definition for 'var'
var2.test: no visible global function definition for 'pf'
var2.test: no visible global function definition for 'qf'
wincor: no visible global function definition for 'cor'
wincor: no visible global function definition for 'var'
wincor: no visible global function definition for 'pt'
winsor.cor.test.default: no visible global function definition for
  'cor'
winsor.cor.test.default: no visible global function definition for 'pt'
winsor.cor.test.paired: no visible global function definition for 'cor'
winsor.cor.test.paired: no visible global function definition for 'pt'
winvar: no visible global function definition for 'var'
winvar.Z : f: no visible global function definition for 'dnorm'
winvar.Z: no visible global function definition for 'integrate'
winvar.Z: no visible global function definition for 'qnorm'
yuen.t.test.formula: no visible global function definition for 'terms'
yuen1.test: no visible global function definition for 'qt'
yuen1.test: no visible global function definition for 'pt'
yuen2.test: no visible global function definition for 'complete.cases'
yuen2.test: no visible global function definition for 'qt'
yuen2.test: no visible global function definition for 'pt'
yuenp.test: no visible global function definition for 'complete.cases'
yuenp.test: no visible global function definition for 'qt'
yuenp.test: no visible global function definition for 'pt'
summary,paired: no visible global function definition for 'cor'
Undefined global functions or variables:
  IQR complete.cases cor cor.test dnorm integrate mad median pchisq pf
  pnorm pt qchisq qf qnorm qt rbinom reorder sd t.test terms var
  wilcox.test
Consider adding
  importFrom("stats", "IQR", "complete.cases", "cor", "cor.test",
             "dnorm", "integrate", "mad", "median", "pchisq", "pf",
             "pnorm", "pt", "qchisq", "qf", "qnorm", "qt", "rbinom",
             "reorder", "sd", "t.test", "terms", "var", "wilcox.test")
to your NAMESPACE file.