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Hypothesis testing : T test in SPSS

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The financial data file is attached but you need spss to open the file.

Data analysis for a financial services company. There are three different Investment Plans that the company could offer to its customers . You are asked to find out if the expected revenue from marketing any one of these plans is different from the other plans. You survey 60 customers and this survey asks each customer to choose a plan they prefer and also involves other relevant questions that allow you to compute the expected revenues that the company can generate from each customer. The data is in financial services.sav. Given the three different plans and the expected revenues, test whether each plan generates the same mean revenue. If the mean revenue generated is different depending on the marketed plan, which plan would be a better choice?

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Step by step method for computing test statistic is given in the answer.

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