In a study that is looking at the proportion of statistics majors that are male and female at a particular university, which of the following could be a null hypothesis for a chi-square test? I. 50% of statisties majors at this university are male, and 50% are female. II. More than 50% of statistics majors are male. II. The proportions of male and female statisties majors at this university are the same as that for the national population. O a l only O b.ll only O cl and Ill only O d. l and III only

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