This site uses different types of cookies, including analytics and functional cookies (its own and from other sites). To change your cookie settings or find out more, click here. If you continue browsing our website, you accept these cookies.
i have data as below and need to calculate for each product each week what the weekly percentage change is and whether that is normal. I am struggling to calculate a % change for each week. Once i have those i hope to calculate the standard deviation and flag anything that is outside 2 standard deviations as abnormal.