Timer
00:00
Your answer
Difficulty–
right wrong
Pick an answer to see how members did
8question types
Log this miss in the free GMAT error log
Get the error log60days
Get one like this every day: the free 60-day plan
Start the plan70, 75, 80, 85, 90, 105, 105, 130, 130, 130
The list shown above consists of the times, in seconds, that it took each of 10 schoolchildren to run a distance of 400 on of meters. If the standard devastation of the 10 running times is 22.4 seconds, rounded to the nearest tenth of a second, how many of the 10 running times are more than 1 standard deviation below the mean of the 10 running times?
A. one
B. two
C. three
D. four
E. five
Answer: B
Source: GMAT Prep
The list shown above consists of the times, in seconds, that it took each of 10 schoolchildren to run a distance of 400 on of meters. If the standard devastation of the 10 running times is 22.4 seconds, rounded to the nearest tenth of a second, how many of the 10 running times are more than 1 standard deviation below the mean of the 10 running times?
A. one
B. two
C. three
D. four
E. five
Answer: B
Source: GMAT Prep
