Answer :
The mean is: 18.28
The median is 19.
The mode is 14.
The range is 9 (23 - 14 = 9).
How to find the mean, median, mode and range?
The mean is the sum of all values divided by the number of values:
Week 2: (23 + 14 + 19 + 21 + 14 + 20 + 17)/7 = 128/7 = 18.28
The median is the middle value.
To calculate, first rearrange values from the lowest to the highest and then find the middle value:
Week 2: 14, 14, 17, 19, 20, 21, 23 - The median is 19.
The mode is the value that occurs most frequently.
Week 2: 14, 14, 17, 19, 20, 21, 23 - The mode is 14.
The range of times is the difference between the highest and the lowest value.
Week 2: 14, 14, 17, 19, 20, 21, 23 - The range is 9 (23 - 14 = 9).
Complete question is:
The table shows the number of hours that a group of students spent studying for the SAT during their first week of preparation. The students each add 4 hours to their study times in the second week. What are the mean, median, mode, and range of times for the second week? 19,10,15,17,10,16,13
Week 1: Week 2:
Student - Hours Student - Hours
Bob 19 Bob 23
James 10 James 14
Karen 15 Karen 19
Rosario 17 Rosario 21
Antoine 10 Antoine 14
Julio 16 Julio 20
Maria 13 Maria 17