STAB22H3 Lecture Notes - Lecture 1: Confidence Interval, Sewage Sludge, Type I And Type Ii Errors

• School: UTSC
• Department: Statistics
• Course: STAB22H3
• Professor: Mahinda Samarakoon

Document Summary

Null hypothesis has to give a parameter value like h 0 : p= 0. 7 . Alternative has to say what you are trying to prove like h a : p 0. 7 . Kind of alternative you use depends on exactly what you want to prove: Decision errors p534: the error made by rejecting the null hypothesis when it is true is called a type i error. The probability of making a type i error is denoted by : the error made by failing to the null hypothesis when it is false is called a type ii error. In a metropolitan area, the concentration of cadmium (cd) in leaf lettuce was measured in. 6 representative gardens where sewage sludge was used as fertilizer. The following measurements (in mg/kg of dry weight) were obtained. 4 the mean concentration of cd is higher than 12. Variable n mean median trmean stdev se mean. 1. 38 degrees of freedom = 6 1 =