In Performing Chi-Square Goodness Fit Test for a Normal Distribution,a

Multiple Choice

In performing chi-square goodness fit test for a normal distribution,a researcher wants to make sure that all of the expected cell frequencies are at least five.The sample is divided into 7 intervals.The second through the sixth interval all have expected cell frequencies of at least five.The first and the last intervals have expected cell frequencies of 1.5 each.After adjusting the number of intervals,degrees of freedom for the chi-square statistic is ____.

A) 2
B) 3
C) 5
D) 7