A card-dealing machine deals spades (1) ,hearts (2) ,clubs (3) ,and diamonds (4) at random as if from an infinite deck.In a randomness check,1,600 cards were dealt and counted.The results are shown below. 
For the goodness-of-fit test,the degrees of freedom are ____.
Definitions:
Successful Farmer
An individual who effectively manages agricultural activities, leading to high productivity and sustainability.
Naturalistic Intelligence
An ability to identify, classify, and manipulate elements of the environment, nature, or animals.
IQ Tests
Standardized tests designed to measure a person's intelligence quotient (IQ), assessing various types of cognitive abilities.
Culture
The shared values, traditions, norms, customs, arts, history, folklore, and institutions of a group of people.
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