lab#2-in-class (1)-8-9solution-RIGHT.docx - Stat252 winter2019 Lab#2 in class Paired vs Independent 13.1-4 vs 13.6)Thursday Jan 17th 2019 1 | P a g e

# lab#2-in-class (1)-8-9solution-RIGHT.docx - Stat252...

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Stat252 winter2019 Lab#2 in class: Paired vs Independent ( 13.1-4 vs 13.6)Thursday, Jan 17 th , 2019 1 | P a g e Lab#2 in class - Friday, January 18 th , 2019 Check “Test Names” to review Paired t-test and / or Independent two sample t-test. Example#1: Atlanta vs Houston hotel rooms cheaper? Suppose that you responsible for making arraignments for a business convention. Because of budget cuts due to the recent recession, you have been charged with choosing a city for the convention that has the least expensive hotel rooms. You have narrowed your choices to Atlanta and Houston. Based on the sample data, can we conclude that the mean price of a hotel room in Atlanta is different than one in Houston? DATASET “ ATLANTA- HOUSTON” What test will you to answer this research question. Two sample t-test a) Identify: response and explanatory variables . y= price of hotel rooms X = location or city ( 2 grops) b) Is it an observational or experimental study? Observational not controlling and not randomizing. c) State the hypotheses in symbols and words: _____ H0: Mean prices of hotel rooms for A and H are the same Ha: The mean prices are different H0: MuH- MuA=0 Ha: MuH- MuA Not equal to 0 d) What assumptions do we need to check for this test? Check all required assumptions. 1) independence of groups: groups are independent !!! 2) Randomization and independence: assume two samples are randomly and independently selected from two populations and rooms within the samples are not related to each other… 3) Normality :

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