Answer:
Given that The data to represent average test scores for a class of 16 students includes an outlier value of 78.
We can find sum of all 16 test scores = 84(16) = 1344
Outlier found = 78
If outlier is removed new sum = 1344-78 = 1266
Number of entries without outlier = 15
New average = 1266/12 =84.4
We find that average of new data increases.
Also whenever we remove outlier std deviation also would be reduced.
Step-by-step explanation:
The first option :
Multiply the first equation by 8 and the second equation by 2
would not result in the elimination of the variables in this system
Answer:
y – 8 = –0.2(x + 10)
Step-by-step explanation:
Answer: 42
Step-by-step explanation:
