when is a trend significant when is statistical testing appropriate when is a statistical test necessary for sales can a statistical test show that sales are significantly different before and after promotion? how to analyze monthly trend data what statistical test do you use to determine the trend of monthly sales after promotion how to measure sales during a promotion how to determine whether a trend is significant before a promotion how to determine if trend is significant what statistical tool should be used to analyze trend of sales statistical analysis of trend of monthly sales prior to promotion when is a statistical testing required to determine if a month's trend is significantly different prior to promotion how to measure if the trend of a month is significantly different before or after a promotional period what statistical test is used to determine if a month ahead trend is significantly different when to use statistical analysis what is the test for determining whether there is a trend in a month sales? when do you test for significant change in sales what test is the most appropriate to use to determine if the monthly sales trend is significantly different before vs. after a promotion? what is statistical test for a sales trend change? how to test sales trend after policy change