In performing a chi-square goodness of fit test for a normal distribution, if there are 7 intervals, then the degrees of freedom for the chi-square statistic is _____________.

In performing a chi-square goodness of fit test for a normal distribution, if there are 7 intervals, then the degrees of freedom for the chi-square statistic is _____________.

A. 7 B. 3 C. 4 D. 6