A researcher ran an analysis to understand if corporate culture was related to business revenue. He sampled local small business representative of all small businesses in the nation. He measured Q1 revenue of the businesses. Then he deployed a training for corporate culture. The next year, he measured Q1 revenue again. He ran an analysis in Microsoft Excel: t-Test: Paired Two Sample for Means. From the data output, he failed to reject the null hypothesis. What conclusion can the researcher determine?