How to Understand & Calculate Statistical Significance [+ Example]

Recently, I was preparing to send an important bottom-of-funnel (BOFU) email to our audience. I had two subject lines and couldn‘t decide which one would perform better. Naturally, I thought, “Let’s A/B test them!” However, our email marketer quickly pointed out a limitation I hadn’t considered: At first, this seemed counterintuitive. Surely 5,000 subscribers was […]

How to Use the Weighted Average Formula in Excel

If someone asks me to find the average of five values — 1, 4, 7, 8, and 10 — the equation is easy. I add up all five values and divide this by the total number of values. It looks like this: (1 + 4+ 7+ 8+ 10) / 5 Do the math, and we […]