(1) multiply each time by how many said it, add them all up, and divide by the total number of students. Review weighted averages.
(2) sort all the times, then pick the middle value
Post your work if you get stuck
A recent survey asks 105 students, How many hours do you spend on the computer in a typical day? Of the 105 respondents, 1 said 1hour, 3 said 2 hours, 11 said 3 hours, 17 said 4 hours, 20 said 5 hours, 24 said 6 hours, 16 said 7 hours, 8 said 8 hours, 5 said 9 hours.
1) What is the average (mean) number of hours spent on the computer? Round your answer to one decimal point.
2) What is the median number of hours spent on the computer?
4 answers
Are you mean like this
1)
1*1=1
2*3=6
3*11=33
4*17=68
5*20=100
6*24=144
7*16=112
8*8=64
9*5=45
---------
=573/53=10.8
2)
1,2,3,4,5,6,7,8,9
=5
1)
1*1=1
2*3=6
3*11=33
4*17=68
5*20=100
6*24=144
7*16=112
8*8=64
9*5=45
---------
=573/53=10.8
2)
1,2,3,4,5,6,7,8,9
=5
There are 1+3+11+17+20+24+16+8+5 = 105 scores
So if they add up to 573, then the mean is 573/105
Since they are ALL less than 10, your answer of 10.8 should have been a big red flag that something was wrong
The median is the 53rd one -- it's a 6
So if they add up to 573, then the mean is 573/105
Since they are ALL less than 10, your answer of 10.8 should have been a big red flag that something was wrong
The median is the 53rd one -- it's a 6
Can you explain how you got the 53rd and it is equal a 6?
2 answers