Problem 65E

Last name and acquisition timing. Refer to the Journal of Consumer Research (August 2011) study of the last name effect in acquisition timing, Exercise 8.13 (p. 433). Recall that the mean response times (in minutes) to acquire basketball tickets were compared for two groups of MBA students-those students with last names beginning with one of the first nine letters of the alphabet and those with last names beginning with one of the last nine letters of the alphabet. How many MBA students from each group would need to be selected to estimate the difference in mean times to within 2 minutes of its true value with 95% confidence? (Assume equal sample sizes were selected for each group and that the response time standard deviation for both groups is σ ≈ 9 minutes.)

Chapter 14: Teaching Every Student Characteristics of Effective Teachers • Clarity and organization • Warmth and enthusiasm • Knowledge: in academic content, in how to teach the content, and in how to match instruction to student differences Pianta and Colleagues Continued Research on Effective Teachers They found three dimensions important for preschool and elementary teachers. affective—emotional support for students cognitive—instructional support behavioral—classroom organization Planning Planning is multileveled. Teachers first plan by year, term, unit, month, week, then day. Decide on time for each area of curriculum. Planning reduces uncertainty but needs to be flexible.