measures of central tendency
A value that represents the centre of a date set. Can be the mean, median, or mode.
A value that represents the centre of a date set. Can be the mean, median, or mode.
Data set is a group of numbers that you must arrange in order from least to greatest.
eg: 2,3,4,5,6,5,4,5,3,34,7,7,3,2,5
Order: 2, 333,444,555,66,7,34
Median- the middle number in a set of data after the data have been arranged in order.
median of- 2,5,6,8,9 is 6
median of - 1,3,6,8,9,10, is 7
if this happens add the two numbers and divide by 2. 6+8=14 then 14/2= 7
eg: 1,2,7,8,9,10 7+8=15/2 15/2= 7.5
Mode- the most frequently occurring number in a set of data.
Mode and most both have 4 letters and mo.
eg:
mode of- 3,5,7,7,9 is 7
mode of - 2,2,4,66,8,11 is 2 and 6
remember you can have more than one mode!
mode of- 1,2,3,5 is no mode
mode of- 1,1,1,2,2,2,3,3,3 is no mode
mode of- 1,1,1,2,2,2,3,3,3,4 is 1,2,3
Mean- a measure of central tendency
the sum of a set of values divided by the number of values in the set.
eg: 4,6,8
4+6+8=18 18/3=6
eg: 2,3,4,5,6,5,4,5,3,34,7,7,3,2,5
Order: 2, 333,444,555,66,7,34
Median- the middle number in a set of data after the data have been arranged in order.
median of- 2,5,6,8,9 is 6
median of - 1,3,6,8,9,10, is 7
if this happens add the two numbers and divide by 2. 6+8=14 then 14/2= 7
eg: 1,2,7,8,9,10 7+8=15/2 15/2= 7.5
Mode- the most frequently occurring number in a set of data.
Mode and most both have 4 letters and mo.
eg:
mode of- 3,5,7,7,9 is 7
mode of - 2,2,4,66,8,11 is 2 and 6
remember you can have more than one mode!
mode of- 1,2,3,5 is no mode
mode of- 1,1,1,2,2,2,3,3,3 is no mode
mode of- 1,1,1,2,2,2,3,3,3,4 is 1,2,3
Mean- a measure of central tendency
the sum of a set of values divided by the number of values in the set.
eg: 4,6,8
4+6+8=18 18/3=6
Range- the positive difference between the largest and smallest values in a data set.
range of- 4,5,5,6,9,1,3,8,8,6 is
1,3,4,5,5,6,6,8,8,9 is 8
9-1=8
biggest number take away little number
-2,-7,-1,-4
-7,-4,-2,-1= +6
range of- 4,5,5,6,9,1,3,8,8,6 is
1,3,4,5,5,6,6,8,8,9 is 8
9-1=8
biggest number take away little number
-2,-7,-1,-4
-7,-4,-2,-1= +6
outlier- a value that is much larger or smaller than the other data value.
the data set may have more than 1 outlier or 0 outliers.
eg:
outliers for- 1,67,68,67,64,65,100 are 1 and 100
here is a video to help you out:
http://www.youtube.com/watch?v=oNdVynH6hcY&feature=related
the data set may have more than 1 outlier or 0 outliers.
eg:
outliers for- 1,67,68,67,64,65,100 are 1 and 100
here is a video to help you out:
http://www.youtube.com/watch?v=oNdVynH6hcY&feature=related
And for homework, find the mean, median, mode, range, outliers for the following:
18,19,79,19,20,12
14,14,16,15,1,16
98,202,99,91,2,95,89,88,94
I hope this helped you guys out!!
12 comments:
nice job Raeesa! i really like how you explained it and the colors you used plus the picture and links helped me a lot but next you could try to add a video but otherwise good job!
Good job raeesa! This really helped me and so did your video and links. I also liked how you used different colours to stand for the different definitions
Great job Raeesa! You explained every definition very well! And the colors you used really helped it stand out very well. The link and video helped too. I also found a link to a game that might be helpful: http://ca.ixl.com/math/grade-7/calculate-mean-median-mode-and-range
Great job Raeesa! I liked how you used lots of different colours and also reminded me about the homework and also put a variety of links for me to choose! But next time you should and a video!
Great Job ! I liked how you add extra color to make the definitions stand out,how you use more then one example ,use more then one link to help me more and reminded me of the math homework.
good job raeesa i liked how you added your colours so the definitions stand out more also how you added two links.
Good Job Raeesa! This really helped me. The colors you used really helped. It stood out very well.OH and the link and video helped too.
Good job your notes were very clear. You used just the right amount of color, the links were very helpful and the video
Good job this really helped me keep up the good work
Awesome job Raeesa! you highlighted the key words and explained it very well, the video helped me a lot. Next time try highlighting more key words.
great job raeesa! i understood everything very well and i liked the pictures and it caught my attention from the colours. good job this will help me study for exams :)
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