PSYC 3000 Lecture Notes - Lecture 9: Alternative Hypothesis, Null Hypothesis, Standard Deviation

• School: Carleton University
• Department: Psychology
• Course: PSYC 3000
• Professor: Lise Paquet

Document Summary

Class 9 q is shorthand for 1 p ! The objective of confidence intervals is to determine the approximate value of a population proportion, p, on the basis of a sample proportion, A confidence interval is a range of values that are our best guess about the population proportion, p. A confidence interval specifies a range of values on either side of the sample proportion within which the population proportion, p, can be expected to fall within a chosen level of confidence. This rule applies to any normal distribution (68-95-99. 7% rule) Focusing on the central 95% of the curve. 95% of the time, you will get a p value within 2 standard deviation of the true value. 95% of values will fall between 0. 175 and 0. 225. 2 p (because there are 2 blue sides) = (2) [because there are 2 blue sides] (0. 0126) [ p ] =