Suppose you’re looking at two lists of numbers. The first list represent hours studied for an exam; the second list contains your final grade on … Read More

So, how do I recruit? You want a specific answer with little means of getting it. How many response will be enough to produce valid … Read More

Binomial probability tells you whether you have a certain number of defects, and whether that is normal or a cause for concern. It works under … Read More

Uncertainty comes in form of confidence intervals: a range within which it’s likely that true number lies given our small amount of data. The plus … Read More

You have some numbers paired together (like ad spending vs. Revenue) or other things like time studied vs. It is a test score. And you … Read More

Do you recall being in school and having your math teacher give you a list of numbers? He’d put 10 scores on blackboard and demand … Read More

Ever been told you’re “in the top ten percent,” only to have no idea what that will do to your score? For some reason, percentiles … Read More

Imagine I give you a coin and ask you to hold it in your hand. You know it will land heads or tails, but you … Read More

Take a standardized test and score an eighty-five. You may be feeling decent about yourself until you see that the class average was seventy, with … Read More

A measure of standard deviation can be quite helpful when analyzing data. If you went to school, then perhaps you recall learning about standard deviation, … Read More