25 Statistics anxiety What can teachers do to alleviate statistics anxiety in their students To explore this ques tion statistics anxiety for students in two classes was compared In one class the instructor lectured in a for mal manner including dressing formally In the other the instructor was less formal dressed informally was more personal used humor and called on students by their first names Anxiety was measured using a ques tionnaire Higher scores indicate a greater level of anxi ety The mean anxiety score for students in the formal lecture class was 25 40 in the informal class the mean was 20 41 For each of the boldface numbers indicate whether it is a parameter or a statistic Explain your