asseatingbandit
14.10.2019 •
Mathematics
Desmond's surf shop had the following number of customers on each of the last ten days:
160, 175, 166, 180, 172, 178, 174, 170, 178, 300
as much as desmond would like to think having 300 customers in one day is normal, he knows that it does not reflect the number of customers that come to the shop each day.
when he removes the outlier of 300 from the data, which of the following happens?
hint:
find the mean with the original data. (get the sum and divide by the number of data points.)
then find the mean of the data points once the 300 is removed.
find the mode.
1points
select two that apply.
a
the mode does not change.
b
the mean does not change.
c
the mean drops from 185.3 to 172.6.
Solved
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Ответ:
A The mode does not change.
C The mean drops from 185.3 to 172.6.
Step-by-step explanation:
Mean of original data
Mean = (160 + 175 + 166 + 180 + 172 + 178 + 174 + 170 + 178 + 300)/10 = 1853/10 = 185.3
Mean with outlier removed
Mean = (1853 - 300)/9 = 1553/9 = 172.6
The mean drops from 185.3 to 172.6 when the outlier is removed.
Mode
The mode of a data set is the value that occurs most often.
Mode = 178
The mode does not change when you remove the outlier.
Ответ:
Hope I helped:D