hypothesestest (version 1.0)

findroot: find the Z score

Description

find the Z score of normal distribution, standard normal distribution, chi-square or t-distribution

Usage

findroot(alpha = 0.05, side = "both", method = "n", n, mu = 0, sigma = 1)

Arguments

alpha

the significance level of the confidence level

side

whether the confidence interval is one or two sides

method

the distribution of the samples follow

n

the amount of the samples

mu

the average of the samples

sigma

the standard deviation of the population

Value

the value return 'z score'(A measure of the distance in standard deviations of a sample from the mean.)

Details

if necessary,please input mu and sigma when the samples don't follow the standard normal distribution

See Also

hypothesis

Examples

##find the z score
findroot(alpha = 0.05, side = "both", method = "n", n=30, mu = 0, sigma = 1)
# 1.959961