Reference no: EM133003666

Problem 1: You need to check carefully whether you have population or sample data in some statistics formulas. Which formulas below change answers if you use sample data instead of population data?

a- Standard deviation
b- Coefficient of variation
c- All of the above
d- Empirical rule
e- Variance

Problem 2: You want to know if the bus you take to work can be trusted to stay on schedule. You know there are small variations with every trip because of traffic issues. You time every trip to create data. Now what is the best way to measure the variations on each bus trip?

a- Don't calculate variance, ask your wife, she knows everything. Remember how you used Google before you got married?
b- Standard deviation is better because it looks at every data item recorded and does not produce a result with a squared unit of measure.
c- The coefficient of deviants is best because it provides a standard ratio to measure deviant behavior
d- Variance is better than range because variance looks at every data item.
e- Use range because it is quick and easy