Null Hypothesis Significance Testing Plot

Generates a plot to illustrate null hypothesis significance testing.

nhstplot(
  alpha = 0.05,
  ci = FALSE,
  dist = "z",
  two.tailed = TRUE,
  right.tail = TRUE,
  statistic = NULL,
  ...
)

Arguments

alpha	Numeric. Significance level \(\left( \alpha \right)\) .
ci	Logical. ci = FALSE by default. If TRUE, plot confidence interval. If FALSE, plot alpha level.
dist	Character string. dist = "z" for the standard normal distribution. dist = "t" for the t distribution. dist = "F" for the F distribution. dist = "chisq" for the chi-square distribution.
two.tailed	Logical. If TRUE, two-tailed alpha. If FALSE, one-tailed alpha. Ignored if dist = "F" or dist = "chisq" as both tests are one-tailed using the right tail.
right.tail	Logical. If TRUE, right tail (positive critical value). If FALSE, left tail (negative critical value). Ignored if two.tailed = TRUE. Ignored if dist = "F" or dist = "chisq" as both tests are one-tailed using the right tail.
statistic	Numeric. Test statistic. This is an optional argument.
...	Degrees of freedom. df for dist = "t" and dist = "chisq". df1 and df2 for dist = "F".

See also

Other alpha functions: alpha2crit(), alpha2prob(), ci2crit(), ci2prob()

Examples

# ci = FALSE
# two-tailed
nhstplot(
  alpha = 0.05,
  dist = "z",
  statistic = 3
)
nhstplot(
  alpha = 0.05,
  dist = "t",
  df = 5
)
# one-tailed
nhstplot(
  alpha = 0.05,
  two.tailed = FALSE,
  right.tail = TRUE
)
nhstplot(
  alpha = 0.05,
  two.tailed = FALSE,
  right.tail = FALSE
)
nhstplot(
  alpha = 0.05,
  dist = "t",
  two.tailed = FALSE,
  right.tail = TRUE,
  df = 5
)
nhstplot(
  alpha = 0.05,
  dist = "t",
  two.tailed = FALSE,
  right.tail = FALSE,
  df = 5
)
nhstplot(
  alpha = 0.05,
  dist = "F",
  df1 = 10,
  df2 = 3
)
nhstplot(
  alpha = 0.05,
  dist = "chisq",
  df = 3
)
# ci = TRUE
# two-tailed
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  dist = "z",
  statistic = 3
)
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  dist = "t",
  df = 5
)
# one-tailed
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  two.tailed = FALSE,
  right.tail = TRUE
)
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  two.tailed = FALSE,
  right.tail = FALSE
)
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  dist = "t",
  two.tailed = FALSE,
  right.tail = TRUE,
  df = 5
)
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  dist = "t",
  two.tailed = FALSE,
  right.tail = FALSE,
  df = 5
)
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  dist = "F",
  df1 = 10,
  df2 = 3
)
nhstplot(
  alpha = 0.05,
  ci = TRUE,
  dist = "chisq",
  df = 3
)