Pairwise t-tests
The ANOVA test didn't tell us which categories of shipment mode had significant differences in pack prices. To pinpoint which categories had differences, we could instead use pairwise t-tests.
late_shipments is available.
Это упражнение является частью курса
Hypothesis Testing in R
Интерактивное практическое упражнение
Попробуйте выполнить это упражнение, дополнив этот пример кода.
# Perform pairwise t-tests on pack price, grouped by shipment mode, no p-value adjustment
test_results <- ___
# See the results
test_results