conint: Calculate the Confidence Interval

In hypothesestest: Confidence Intervals and Tests of Statistical Hypotheses

Description

Calcalte the confidence interval of the mean from a population or the difference between two means from two populations.

Usage

conint(TrnX = NULL, TrnY = NULL, m, n1, n2, s1, s2, side = "both", alpha = 0.95, method = "n")

Arguments

TrnX	the observed values of a random sample from a distribution
TrnY	the observed values of a random sample from another distribution
m	the mean of the observed values of the first random sample
n1	the number of the random variables of TrnX
n2	the number of the random variables of TrnY
s1	the standard variance of TrnX
s2	the standard variance of TrnY
side	whether the confidence interval is one or two sides
alpha	the significance level of the confidence level
method	Are we going to calculate the confidence interval of the mean from a population or the difference between two means from two populations? Is the population from a normal distribution, a t distribution or a chi-square distribution?

Details

The confidence interval consists of some information such as the significance level and whether it is one or two sides. The random samples may come from normal distributions,t distributions or chi-square distributions.

Value

a	the left end point of the confidence interval
b	the right end point of the confidence interval

Note

Although we have the confidence interval of the mean or the difference between two means, we can't ensure that the mean or the difference between two means is bound to be in the confidence interval.

Author(s)

Chengfeng Liu, Huiqing Liu, Yingyan Liang and Ruibin Feng Maintainer: Chengfeng Liu ([e-mail])

See Also

findroot

Examples

conint(m=67.53,n1=25,s1=10,side="both",alpha=0.95,method="n") #63.61 71.45

hypothesestest documentation built on May 2, 2019, 8:33 a.m.