Mariela earned the following test scores in math: 95, 90, 100, 85, 80 Mr. Adams accidentally entered Mariela’s next test score as 0. Which of these statements are true? Check all that apply. Before the error, the mean and the median were both 90. Before the error, the mean was 90 and the median was 100. The error added an outlier to the data set. After the error, the median remained the same. After the error, the mean was 75 and the median was 87.5. The mean was impacted by the error more than the median. Only the median was impacted by the error.
Answers
Given:
Mariela earned the following test scores in math: 95, 90, 100, 85, 80 Mr. Adams accidentally entered Mariela’s next test score as 0.
To find:
Which of these statements are true?
Check all that apply.
Before the error, the mean and the median were both 90.
Before the error, the mean was 90 and the median was 100.
Solution:
Arrange the data in ascending order.
80, 85, 90, 95, 100
We have,
Mean = (80+85+90+95+100)/5 = 450/5 = 90
Median = 90
When a 0 is added (error)
0, 80,85,90,95,100
We get new mean and median.
Mean = (0+80+85+90+95+100)/6 = 450/6 = 75
Median = (85+90)/2 = 87.5
When the data is changed, the mean changed from 90 to 75 and the median changed from 90 to 87.5.
Before the error, the mean and the median were both 90.
The error added an outlier to the data set.
After the error, the mean was 75 and the median was 87.5
The mean was impacted by the error more than the median
Answer:
1
3
5
6
Step-by-step explanation:
right on edg