Each person who applies for an assembly job at Robert's Electronics is given a mechanical aptitude test. One part of the test involves assembling a plug-in unit based on numbered instructions. A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution. What is the standard deviation (in minutes)?
A) 3.89
B) 6.01
C) 8.78
D) 17.00
E) None of the choices are correct.

Question

Each person who applies for an assembly job at Robert's Electronics is given a mechanical aptitude test. One part of the test involves assembling a plug-in unit based on numbered instructions. A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution.  What is the standard deviation (in minutes)?
A) 3.89 
B) 6.01 
C) 8.78 
D) 17.00 
E) None of the choices are correct.

Quizplus · Accepted Answer

The Answer of Each person who applies for an assembly job at Robert's Electronics is given a mechanical aptitude test. One part of the test involves assembling a plug-in unit based on numbered instructions. A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution.  What is the standard deviation (in minutes)?
A) 3.89 
B) 6.01 
C) 8.78 
D) 17.00 
E) None of the choices are correct.

Each Person Who Applies for an Assembly Job at Robert's