There are four entrances to Govt center. The building supervisor wants to know if entrances are equalized. To investigate, 400 people were seen entering the center. The number using each entrances is below. At the .01 significance level is there a difference in the use of the four entrances?

Entrance Frequency
Main Street 140
Broad Street 120
Cherry Street 90
Walnut Street 50
Total 400

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