Checking the constant variance condition
In addition to checking the normality of distributions of vocabulary scores across levels of social class, we need to check that the variances from each are roughly constant.
Latihan ini adalah bagian dari kursus
Inference for Numerical Data in R
Petunjuk latihan
- Group by social class.
- Summarize to calculate the standard deviations of vocabulary scores, storing in a column named
std_dev_wordsum. - Verify the constant variance condition.
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
gss %>%
# Group by class
___ %>%
# Calculate the std dev of wordsum as std_dev_wordsum
____