In the 1940s, Stanley Smith Stevens introduced four scales of measurement: nominal, ordinal, interval, and ratio. These are still widely used today as a way to describe the characteristics of a variable. Knowing the scale of measurement for a variable is an important aspect in choosing the ri...
sex is a dichotomous variable as it contains precisely 2 distinct values. married is not a dichotomous variable: it contains 3 distinct values. It would be dichotomous if we just distinguished between currently married and currently unmarried. q1 is a dichotomous variable: since empty cells (missin...
What is a Variable? The definition of a variable changes depending on the context. Typically, a letter represents them, and it stands in for a numerical value. In algebra, a variable represents an unknown value that you need to find. For mathematical functions and equations, you input their ...
One-Way Analysis of Variance (ANOVA) tells you if there are any statistical differences between the means of three or more independent groups.
What type of variable is gender? For example, gender isa nominal variablethat can take responses male/female, which are the categories the nominal variable is divided into. How do you control extraneous variables? One way to control extraneous variables iswith random sampling. Random sampling does...
there is a possibility of multiple modal responses. For example, if cashews and whipped cream both selected at a similar number of times, then the responses from multiple choice as mentioned in the ice cream example is considered by the researchers to generate a metric variable that is used as...
What is the mode, and with what type of data is it most appropriate? What term refers to the number of peaks in a distribution? How many independent variables and conditions (cells) are in a 4 x 6 factorial design? Can be the dependent variable be nominal? What is the distinction betwe...
Here’s a simple situation: Suppose you want to test golf ball flight distances, so you set up a simple experiment in which various golf balls are placed into a mechanical chute and fired into the air. The variable you really care about, the “output” ordependent variableisgolf ball dista...
(1)某人存入银行10万元,若存款利率4%,第5年末取出多少本利和? (2)某人计划每年末存入10万元,连续存5年,若存款利率4%,第5年末账面的本利和为多少? (3)某人希望未来第5年末可以取出10万元的本利和,若存款利率4%,问现在应存入银行多少钱? (4)某人希望未来5年,每年年末都可以取出10万元,若存款利率4%,问现在...
and not nominal rates, fluctuations of the rate are absent any impacts of inflation. This same concept can be applied to prices (i.e. the cost of a banana in the year 2000 vs. every year since). The same analysis can be performed using nominal rates which introduces a material variable...