Category: Uncategorized

The subset function is used to pick out parts of a data frame that meet certain criteria.

What is the name of the function in R that computes the mode?

You want to analyze the relationship between two variables that are not normally distributed. What statistical test is most appropriate?

A sample with more variability would result in a smaller confidence interval.

To quantitatively determine if the variable describing Alex Morgan’s number of goals per season is normally distributed, what R function would you use?

You are working with a very large data frame name “socioeco” and want to pick out just the value in row 3 and column 3 and save it as variable “z”. What code snippet would accomplish this?

is the empty hypothesis that describes a finding of no difference and is assumed to be true until there is substantial evidence to reject it.

In our dataset there is a variable for streamflow that exhibits negative skew. This tells us that the: 

For our temperature variable, the mean is 20 degrees Celsius and the standard deviation is 5 degrees Celsius. What is the coefficient of variation? Formula: CV = s / x̅ 

Hypothesis testing is a single step procedure used to prove if something is true.