Question

the mean scores for students in a statistics course (by major) are shown below. what is the mean score for the class? 9 engineering majors: 90 5 math majors: 95 13 business majors: 86 the class’s mean score is (type an integer or a decimal rounded to two decimal places as needed.)

Explanation:

Step1: Calculate total scores for each major

Engineering: $9 \times 90 = 810$
Math: $5 \times 95 = 475$
Business: $13 \times 86 = 1118$

Step2: Calculate total number of students

Total students: $9 + 5 + 13 = 27$

Step3: Calculate total scores for all students

Total scores: $810 + 475 + 1118 = 2403$

Step4: Calculate class mean score

Mean score: $\frac{2403}{27} \approx 89.00$

Answer:

89.00