A researcher obtained a random sample of n = 60 students to determine whether there were any significant preferences among three leading brands of...

A researcher obtained a random sample of n = 60 students to determine whether there were any significant preferences among three leading brands of colas. Each student tasted all three brands and selected his or her favorite. Population data suggests that 50% prefer brand A, 30% prefer Brand B and 20% prefer Brand C. Is there sufficient data to determine that these student data reflect population data? Determine using alpha .05 as critical value.