ifr_ts_paired_ttest: Paired t test

In rsquaredacademy/inferr: Inferential Statistics

Paired t test

Description

ifr_ts_paired_ttest tests that two samples have the same mean, assuming paired data.

Usage

ifr_ts_paired_ttest(
  data,
  x,
  y,
  confint = 0.95,
  alternative = c("both", "less", "greater", "all")
)

Arguments

data	a data.frame or tibble
x	numeric; column in data
y	numeric; column in data
confint	confidence level
alternative	a character string specifying the alternative hypothesis, must be one of "both" (default), "greater", "less" or "all". You can specify just the initial letter.

Value

ifr_ts_paired_ttest returns an object of class "ifr_ts_paired_ttest". An object of class "ifr_ts_paired_ttest" is a list containing the following components:

Obs	number of observations
b	mean, standard deviation and standard error of x, y and their difference
tstat	t statistic
p_lower	lower one-sided p-value
p_upper	upper one-sided p-value
p_two_tail	two sided p-value
corr	Correlation of x and y
corsig	p-value of correlation test
conf_int1	confidence interval for mean of x
conf_int2	confidence interval for mean of y
conf_int_diff	confidence interval for mean of difference of x and y
df	degrees of freedom
confint	confidence level
alternative	alternative hypothesis
var_names	names of x and y
xy	string used in printing results of the test

Deprecated Function

infer_ts_paired_ttest() has been deprecated. Instead use ifr_ts_paired_ttest().

References

Sheskin, D. J. 2007. Handbook of Parametric and Nonparametric Statistical Procedures, 4th edition. : Chapman & Hall/CRC.

See Also

t.test

Examples

# lower tail
ifr_ts_paired_ttest(hsb, read, write, alternative = 'less')

# upper tail
ifr_ts_paired_ttest(hsb, read, write, alternative = 'greater')

# both tails
ifr_ts_paired_ttest(hsb, read, write, alternative = 'both')

# all tails
ifr_ts_paired_ttest(hsb, read, write, alternative = 'all')

rsquaredacademy/inferr documentation built on Nov. 13, 2024, 9:37 a.m.