User:ISHIKAWAYI/Statistical hypothesis testing

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Decision rules for one-sided and two-sided hypothesis

Article body

 * one-sided
 * right-tailed (upper-tailed)
 * H0: μ <= μ0, Ha: μ > μ0
 * reject the null hypothesis if test statistic > critical value
 * left-tailed (lower-tailed)
 * H0: μ >= μ0, Ha: μ < μ0
 * reject the null hypothesis if test statistic < critical value


 * two-sided
 * H0: μ = μ0, Ha: μ ≠ μ0
 * reject the null hypothesis if |test statistic| > |critical value|