Tying it all together!
Now let's switch to a new question to practice some of the skills we learned in this chapter. Let's investigate whether or not the total cholesterol varies, on average, between physically active and inactive Americans.
This exercise is part of the course
Analyzing Survey Data in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Find means of total cholesterol by whether or not active
out <- ___(formula = ___,
by = ___,
design = NHANES_design,
FUN = ___,
na.rm = TRUE,
keep.names = FALSE)