Thursday, May 21, 2009

Developing Expert Voices


a.) Statistic Problem

For boys, the average number of absences in the first grade is 15 with a standard deviation of 7; for girls, the average number of absences is 10 with a standard deviation of 6.

In a nationwide survey, suppose 100 boys and 50 girls are sampled. What is the probability that the male sample will have at most three more days of absences than the female sample?


Draw scale diagrams of the following vectors using pencil, ruler, protractor, and paper. Label the diagram. Be sure to indicate the scale you used.

(1.) Tiffany walks 13 blocks in a direction East 13 degrees South.

(2.) A boat is headed 300 degrees at 45 km/h.

Time line

May 22 - rough draft questions
May 25 - consult with partner(s)
May 29 - rough copy
June 03 - completion of the project
June 04 to 05 - hand in the project


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