MGCR 271 Lecture Notes - Lecture 3: Atomic Orbital, Confidence Interval, Weighted Arithmetic Mean

• School: McGill University
• Department: Management Core
• Course: MGCR 271
• Professor: Glenn Zabowski

Document Summary

H0: 1 - 2 = 0 ( 1 = 2). H1: 1 - 2 0 ( 1 2). Note: use +z(1 - ) for utts and use -z(1 - ) for ltts. If at least one of n1, n2 < 30, 2. If at least one of n1, n2 < 30, 2 variances) and populations are normally distributed: & use al: t(1 - /2; n1 + n2 - 2). Since the variances are assumed to be equal, a single estimate of the population variance is made by pooling the two sample variances together. Confidence intervals for 2 population means (independent samples): A company wishes to determine if there is a difference in mean salaries paid to male and female employees doing similar jobs. A random sample of 38 female employees (population #1) was found to have mean salary of ,172 with a standard deviation of ,415.