infer_ts_paired_ttest {inferr}

Paired t test

Description

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

Usage

infer_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

infer_ts_paired_ttest returns an object of class "infer_ts_paired_ttest". An object of class "infer_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

paired_ttest() has been deprecated. Instead use infer_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
infer_ts_paired_ttest(hsb, read, write, alternative = 'less')

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

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

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