Evaluating expressions means that you’ll be replacing or “plugging in” numbers for variables and then simplifying using the order of operations until you arrive at a single number. Sometimes you’ll be able to plug in the numbers without issue, but there are other times (when there’s multiplication, exponents, or when plugging in a negative number) where you’ll need to plug in the numbers using parentheses.
Read MoreThe simplest kind of information we’ll work with in this course is a set of individuals with one or more properties, called variables. The individuals are the items in the data set and can be cases, things, people, etc. When we construct a table, we want to think about whether we have more individuals or more variables. We’ll usually put whichever we have more of down the side of the table, so that the table is taller rather than wider.
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