Sorting and counting data:

Sorting and counting data:

Mean; often referred to as the average, the mean is calculated using the following formula

Mean

Mean = total sum of values / quantities of values.

Mode ：the mode is the most frequently occurring (most common) value.

Bivariate data:

Bivariate data is when we have a sample that has two variables for each individual in the sample. Often, we are trying to find if there is a relationship between the variables. Bivariate data is commonly shown in scatterplot, as this can shows the relationship between the variables.

Scatter plot: the independent variable is usually plotted on the x-axis. This is the variable is what we can control and represents the input of causes, such as time, temperature and cost. etc the dependent variable is plotted on the y-axis.

Scatter plot example question:

How many ninjas were involved in the survey?

Remember how many individuals are in our samples by counting the numbers of dots on our scatterplot.