# Documents about Independent Random Samples

• 2 Pages

#### exam2prep

Cal Poly, STAT 301

Excerpt: ... STAT 301 Exam 2 Preparation Logistics: Wed Feb 18 from 10:10-11am Open-book, open-notes Bring calculator No computer use Material from Tues Jan 27 Fri Feb 13, HW9-14 Optional review problems o Ch1: 20, 21, 23, 24, 26, 43, 44, 46, 47, 51 o Ch5: 1, 3, 5, 8, 10, 13, 16, 17, 20, 22 Overview: We have analyzed studies that involve two categorical variable, for which the results can be organized in a two-way table. We have studied how to conduct inferences depending on whether the data were collected from: A randomized experiment Independent random samples Neither We have also considered how the scope of conclusions to be drawn depends on how the data were collected. More specifically, random assignment allows for drawing cause/effect conclusions, and random sampling allows for generalizing to a larger population. We learned three ways to conduct statistical inference in this situation: Simulation o Randomization model (for randomized experiment) o Binomial sampling mode ...

• 4 Pages

#### stat400lec28

UIllinois, STAT 400

Excerpt: ... Statistics 400 Section 7.3 Confidence Intervals for Difference of Two Means If X1, X2, ., Xn are observations of a random sample of size n from a normal distribution N( x, 2 x ), then we have X is N( x, 2 x /n) If Y1, Y2, ., Ym are observations of ...

• 2 Pages