Each of 7 students reported the number of movies they saw in the past year. This is what they reported.15, 17, 20, 15, 9, 20, 15Find the mean and median number of movies that the students saw.If necessary, round your answers to the nearest tenth.
Question
Each of 7 students reported the number of movies they saw in the past year. This is what they reported.15, 17, 20, 15, 9, 20, 15Find the mean and median number of movies that the students saw.If necessary, round your answers to the nearest tenth.
Solution
To find the mean (average) number of movies the students saw, you need to add up all the numbers and then divide by the total number of students.
Here's how you do it:
- Add up all the numbers: 15 + 17 + 20 + 15 + 9 + 20 + 15 = 111
- Divide by the total number of students: 111 ÷ 7 = 15.857142857142858
So, the mean number of movies the students saw is approximately 15.9 (rounded to the nearest tenth).
To find the median (the middle number), you need to list the numbers in numerical order and then find the number that falls in the middle.
Here's how you do it:
- List the numbers in numerical order: 9, 15, 15, 15, 17, 20, 20
- Find the middle number. Since there are 7 numbers, the middle number is the fourth one, which is 15.
So, the median number of movies the students saw is 15.
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