q 7.) the line plots compare the test scores for a first- & second - period math class. what is the average…
q 7.) the line plots compare the test scores for a first- & second - period math class. what is the average number of points in the first - period math class?
Answer
Explanation:
Step1: Count the number of data - points
For the first - period class, count the number of 'x's. There are 1 + 2+3 + 2+1=9 data - points.
Step2: Calculate the sum of the points
Multiply each score by the number of 'x's at that score and sum them up. (2×1)+(3×2)+(4×3)+(5×2)+(6×1)=2 + 6+12 + 10+6 = 36.
Step3: Calculate the average
The average (mean) is the sum of the points divided by the number of data - points. Average=$\frac{36}{9}$ = 4.
Answer:
4