# Week 9 Lab Assignment - Two-Sample t-Methods.pdf - ST 351...

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ST 351 Week 9 Lab Assignment (30 points) Two-Sample t-Methods for a Difference in Population Means Ava Thomas, Lab Section 013 1. Living Min 1 st Quartile Median Mean 3 rd Quartile Max Standard Deviation Sample Length Off Campus 0.0 400.0 548.0 524.9 697.5 1350.0 272.6893 435 On Campus 0.0 700.0 1000.0 894.2 1100.0 2000.0 423.8100 97
2. It can be assumed that the three conditions of two-sample t-methods have been met as the data in each sample is large. Both on campus and off campus living rents are quantitative variables and are from independent populations. Within the graph, it appears that the data is normally distributed due to the lack of skewness within the quartiles. There are outliers in both samples, which may negatively affect the mean and median values. 3. a. The null hypothesis can be listed as H O : μ rent - μ living = 0 where the mean rent per room in dwellings for Oregon State students is the same for both on and off campus residents. The alternative hypothesis can be listed as H A : μ rent - μ living 0 where the