The ANOVA test performed for determined that not all mean commute times across the four cities are equal. However, it did not indicate which means differed. To find out which population means differ requires further analysis of the direction and the statistical significance of the difference between paired population means. Tukey 95% confidence intervals are shown below. 
Which of these pairs of cities show a significant difference between the average commute times to work?
Definitions:
Streptococci
A genus of round-shaped bacteria, some strains of which can cause diseases in humans such as strep throat, rheumatic fever, and other infections.
Rheumatic Fever
An inflammatory disease that can develop as a complication of untreated or improperly treated strep throat or scarlet fever.
Grape-Like Clusters
A descriptive term often used in microbiology to describe the appearance of certain bacteria, such as Staphylococcus, when viewed under a microscope.
Staphylococci
A group of bacteria commonly found on the skin and in the nose, which can cause a range of infections, from minor to life-threatening.
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