An umbrella store recorded the daily rainfall in millimetres and the number of umbrellas sold. It was listed on a table and then translated into a scatter plot as shown below. Find the three median points of the data
A data set with two variables x and y can have a median point(X,Y) where X and Y are the medians of a section of x and y respectively.
First, break the data into three sections
Next, find the median point for each section.
1st section:
Arrange each row in ascending order
Umbrella: X[4,8,12]
Rainfall: Y[2,5,6]
Take each middle value and use them as coordinates of the 1st median point
1st median point: (8,5)
2nd section:
Arrange each row in ascending order
Umbrella: X[16,20,25]
Rainfall: Y[8,9,12]
Take each middle value and use them as coordinates of the 2nd median point
2nd median point: (20,9)
3rd section:
Arrange each row in ascending order
Umbrella: X[32,36,40]
Rainfall: Y[11,13,15]
Take each middle value and use them as coordinates of the 3rd median point
3rd median point: (36,13)
(8,5)
(20,9)
(36,13)
Question 2 of 3
2. Question
An umbrella store recorded the daily rainfall in millimetres and the number of umbrellas sold. It was listed on a table and then translated into a scatter plot as shown below. Draw the median regression line of the following data
