Answer:
B. The mean study time of students in Class B is less than students in Class A.
Step-by-step explanation:
First step is to calculate the mean and median for both classes.
Class A: 2, 5, 7, 6, 4, 3, 8, 7, 4, 5, 7, 6, 3, 5, 4, 2, 4, 6, 3, 5
sorted data set: 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8
total: 96
# of students: 20
Mean/average: 96 / 20 = 4.8
Median: By looking at the sorted data set, we see that the 10th value is the first 5, so median = 5
Class B: 3, 7, 6, 4, 3, 2, 4, 5, 6, 7, 2, 2, 2, 3, 4, 5, 2, 2, 5, 6
Sorted data set: 2, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7
Total: 80
# students: 20
Mean/average: 80 / 20 = 4
Median: By looking at the sorted data set, we see that the 10th value is the first 4, so median = 4
So, we can see that the mean study time for group B was less than the students of class A. Answer B.
without any parenthesis needed around the fraction. Notice how there is no (x) at the end.