ME11 2GP SW #1 Range Rule of Thumb; Coefficient of Variation

What is the coefficient of variation of a sample that has a mean of 10 and standard deviation of 2?

• 20

• 20%

• 2

• 2%

If all data values are the same in a set, what is the value of its variability?

• R/4

• 1

• 100%

• 0

If data in set A are more consistent than in set B, then data in set A have higher standard deviation.

• True

• False

If the range of a data set is 25. Find the approximated value of the standard deviation, using the range rule of thumb. Round off answers to the nearest hundredths.

• 6.25

• 3.25

• 4.25

• 5.25

If data in set A are more variable than in set B, then data in set A are less consistent.

• True

• False

Which is true about coefficient of variation?

• The middle value of a set of data.

• The squared value of the standard deviation.

• A measure of variation used when data sets have different units.

• The difference between the largest and lowest value of a set of data.

What is the estimated standard deviation in Set 1?

• 6.25

• 3.25

• 4.25

• 5.25

What is the estimated standard deviation in Set 2?

• 0.83

• 1.15

• 1

• 0.98

To compare the variability of the two given sets, is it necessary to compute for their CVar?

• YES

• NO

Referring to the previous YES or NO question, if you answered NO just put NA in the box. If you answered YES, then what is the coefficient of variation in Set 1? Round off answer to two decimal places if necessary.

• 15.63%

• 16.35%

• 15.36%

• 13.65%