printingvasup.blogg.se - Excel linear regression p value one-tail or two tail

Learn more about admission into these programs and explore how your Coursera work can be leveraged if accepted into a degree program at. This course is part of Gies College of Business’ suite of online programs, including the iMBA and iMSM.

Use linear regression model for prediction.

Compare differences between populations.

The course will focus not only on explaining these concepts but also understanding the meaning of the results obtained. This will be accomplished through use of Excel and using data sets from many different disciplines, allowing you to see the use of statistics in very diverse settings. 2-tailed value TDIST(t, df Res, 2) in Excel 2007 95 confidence interval b ± t crit s b In addition to the principal results described in Figure 3, one can optionally generate a table of residuals and a table of percentiles as described in Figure 4. While you will be introduced to some of the science of what is being taught, the focus will be on applying the methodologies. The residuals of regression, e,aredenedase (a 0+ a 1x) y,anditsvariance,s2 e,is s2 e 1 N eff 2 XN i e2 i (1.33) This measures the scatter of data about the. One tail test gives more power to reject the null hypothesis because it slightly lowers the boundary of the condence interval.

Our focus will be on interpreting the meaning of the results in a business and managerial setting. it is acceptable to perform the one tail test. The fundamental concepts studied in this course will reappear in many other classes and business settings. To this end, the course aims to cover statistical ideas that apply to managers by discussing two basic themes: first, is recognizing and describing variations present in everything around us, and then modeling and making decisions in the presence of these variations.

For the t-statistic approach the reported t-statistic is appropriate but the critical value is now t.05 (3) TINV (0.10,3) 2.353.

This course provides an analytical framework to help you evaluate key problems in a structured fashion and will equip you with tools to better manage the uncertainties that pervade and complicate business processes. For the p-value approach the reported p-value is for a two-sided test and needs to be halved for a one-sided test: p 0.0405/2 0.202.