Testing Hypotheses σ is known and n > 30 I One sample test for the population mean 1 H0 µ=µo 2 Ha µ≠µo;The choice of n = 30 for a boundary between small and large samples is a rule of thumb, only There is a large number of books that quote (around) this value, for example, Hogg and Tanis' Probability and Statistical Inference (7e) says "greater than 25 or 30" (n=30) Nonanemic in Infancy (n=133) Gross Motor Score Verbal IQ `
Comparison Of Means One Sample Unknown Population Sd Env710 Statistics Review Website