The $\chi ^ { 2 }$ goodness-of-fit test statistics, when there are 6 categories and 2 parameters to be estimated, has approximately a chi-squared distribution with __________ degrees of freedom.

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The Answer of The $\chi ^ { 2 }$ goodness-of-fit test statistics, when there are 6 categories and 2 parameters to be estimated, has approximately a chi-squared distribution with __________ degrees of freedom.

The χ2\chi ^ { 2 }χ2 Goodness-Of-Fit Test Statistics, When There Are 6 Categories and 2

The $\chi ^ { 2 }$ Goodness-Of-Fit Test Statistics, When There Are 6 Categories and 2