Andy is thinking of selling dark chocolate, milk chocolate and white chocolate. He thinks men and women may have a different preference with regards to chocolate. He collected a random sample of 50 customers noting if they were male and female and recorded their preferred type of chocolate. Which hypothesis test should he use? A. One mean (sigma known) B. One mean (sigma unknown ) C. Mean of differences using dependent samples (paired data) D.several means(ANOVA) E. One proportion F. Difference of two proportions G. Chi-square H. Difference of two means (independent samples)