(a) Mean of Dealership 1: 53800
Median of Dealership 1: 42000
Mean of Dealership 2: 38600
Median of Dealership 2: 28000
(b) the median because there are outliers
The mean of the dealership1 is 53,000
The mean of the dealership 2 is 38,600
The median of the dealership 1 is 42,000
The median of the dealership 2 is 28,000
'The arithmetic mean, also known as arithmetic average, is a measure of central tendency of a finite set of numbers.
The median is the value separating the higher half from the lower half of a data sample.'
Dealer ship 1 = 25,000, 42,000, 37,000, 45,000, 120,000
Mean = [tex]\frac{25,000+42,000+ 37,000+45,000+ 120,000}{5}[/tex]
= 53,800
Dealership 2 = [tex]\frac{28,000+95,000+18,000+19,000+33,000}{5}[/tex]
= 38,600
For Median, we need to have to arrange the given dataset in ascending order.
For data-set 1,
⇒ 25,000, 37,000, 42,000, 45,000, 120,000
Median is the middle-most value.
⇒ 42,000
For data-set 2,
⇒ 18,000, 19,000, 28,000, 33,000, 95,000
Now, median is the middle-most value.
⇒ 28,000
Now, median will provide more accurate middle-most value because it is not affected by the values of the outliers.
Hence, we can conclude, the mean and the median of dealer-ship 1 is 53,000 and 42,000 and that of dealership 2 is 38,600 and 28,000 respectively.
Learn more about mean and median here: https://brainly.com/question/22806323
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