Q Math 54 Collected Work Section 3.3 Collected Work Name: Total points: 10 1. The following frequency distribution represents the birth weight of all babies born in the U.S. in 2017 Weight (Grams) Number of Babies Midpoints 0 – 999 25,446 1000 – 1999 91,375 2000 – 2999 924,163 3000 – 3999 2,513,786 4000 – 4999 296,874 5000 – 5999 4241 a. (2) Calculator the class midpoint for each class (fill answers on the above table). b. (4) Approximate the mean and standard deviation birth weight (use the TI calculator functions) Mean: Standard deviation: 2. (4) In Melanie’s calculus class, attendance counts for 5% of the grade, quizzes count for 10% of the grade, exams count for 60% of the grade, and the final exam counts for 25% of the grade. Melanie had a 100% average for attendance, 93% for quizzes, 86% for exams, and 85% on the final. Determine Melanie’s course average. 1

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