Provide an appropriate response.
-Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual. Consider a score to be unusual if it is at least three standard deviations above or
Below the mean. Round the z-score to one decimal place, if necessary.
A time for the 100 meter sprint of 20.2 seconds at a school where the mean time for the 100 meter
Sprint is 17.5 seconds and the standard deviation is 2.1 seconds.
A)2.7; unusual
B)1.3; not unusual
C)1.3; unusual
D)-1.3; not unusual

Question

Provide an appropriate response.
-Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual. Consider a score to be unusual if it is at least three standard deviations above or
Below the mean. Round the z-score to one decimal place, if necessary.
A time for the 100 meter sprint of 20.2 seconds at a school where the mean time for the 100 meter
Sprint is 17.5 seconds and the standard deviation is 2.1 seconds. 
A)2.7; unusual
B)1.3; not unusual
C)1.3; unusual
D)-1.3; not unusual

Quizplus · Accepted Answer

The z-score is calculated as (20.2 - 17.5) / 2.1 = 1.3. Since 1.3 is less than 3, the score is not considered unusual.

Provide an Appropriate Response