Helpppppp!!!!!!!!!All you need to do is explain the steps!!!!
2 answers:
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Answer:
The standard deviation is 11 points
Step-by-step explanation:
To calculated the z-score of a value x, we use the following equation:
Where m is the mean, s is the standard deviation and z is the z-score.
If we solve this equation for s, we get:
So, replacing z by 2, m by 153 and x by 175, we get:
Therefore, the standard deviation is 11 points
if x≥0 then |x|=x
if x<0 then |x|=-x
1) for x≥0
2) for x<0
The answer is: