A sample of 60 infants participated in a test of color preference. Each was put in a special crib where four color patches were projected above the crib simultaneously. Researchers measured the amount of time each infant spent looking at each color. The color receiving the most attention was identified as that infant's preferred color. Here are the preferences for the 60 infants:

RED GREEN BLUE YELLOW

21 11 18 10

• Do these data indicate any significant preferences among the four colors? Test with a = 0.05.