Respuesta :
Answer:
IQR = 10.
Step-by-step explanation:
15,19,20,25,25,28,29,30,30,35,37,43
There are 12 numbers in the list so the median is the mean of 28 and 29,
The lower quartile is the mean of the 3rd and 4th numbers and the upper quartile is the mean of the 9th and 10th numbers.
Lower quartile = (20+25) / 2 = 22.5.
Upper quartile = (30 + 35) / 2 = 32.5.
So the IQR = 32.5 - 22.5 = 10.
Answer:
IQR = 10
Step-by-step explanation:
The interquartile range is the difference between the upper quartile and the lower quartile.
Firstly find the median of the data set.
The median is the middle value of the data arranged in ascending order. If there is no exact middle then it is the average of the 2 values either side of the middle.
15 19 20 25 25 28 29 30 30 35 37 43
↑median
median = [tex]\frac{28+29}{2}[/tex] = 28.5
The lower quartile is the middle of the data to the left of the median.
15 19 20 25 25 28
↑ lower quartile
lower quartile = [tex]\frac{20+25}{2}[/tex] = 22.5
The upper quartile is the middle of the data to the right of the median
29 30 30 35 37 43
↑ upper quartile
upper quartile = [tex]\frac{30+35}{2}[/tex] = 32.5
IQR = 32.5 - 22.5 = 10
