Question

the scores and their percent of the final grade for a statistics student are given. what is the student’s weighted mean score? homework 86 15 quiz 82 15 quiz 96 15 project 100 25 final exam 90 30 the student’s weighted mean score is (simplify your answer. round to two decimal places as needed.)

Explanation:

Step1: Calculate weighted score for each item

• Homework: $86\times0.15 = 12.9$
• Quiz1: $82\times0.15 = 12.3$
• Quiz2: $96\times0.15 = 14.4$
• Project: $100\times0.25 = 25$
• Final Exam: $90\times0.30 = 27$

Step2: Sum all weighted scores

Sum = $12.9 + 12.3 + 14.4 + 25 + 27$
First, $12.9+12.3 = 25.2$; then $25.2+14.4 = 39.6$; then $39.6+25 = 64.6$; then $64.6+27 = 91.6$

Answer:

91.60