COMM 291 Study Guide - Final Guide: Normal Distribution

• School: UBC
• Department: Commerce
• Course: COMM 291
• Professor: Jonathan Berkowitz

Document Summary

Notes: anywhere you see cumulative , enter 1 or true . Functions in bold font are the most useful ones: hypothesis tests and confidence intervals using z. These are only used for normal distribution questions, not cis or hyp. tests. Norm. inv(0. 95,0,1)= 1. 645: hypothesis tests and confidence intervals using t. Excel functions for p-values and critical values: z, t, . Notes: anywhere you see cumulative , enter 1 or true : hypothesis tests and confidence intervals using z. Norm. s. dist(z-stat,cumulative) may need to subtract from 1, and then double for 2-tail tests. = critical value for cis use prob = /2. = use for p-value gives left side area so. Norm. s. inv(0. 95) = 1. 645: hypothesis tests and confidence intervals using t. T. inv. 2t(0. 05,20) = 2. 086: hypothesis tests and confidence intervals using 2. Chisq. inv. rt(0. 05,4) = 9. 49: hypothesis tests and confidence intervals using f. = 1-tail (right tail) critical value for hyp test.