Question

True or false a. The standard deviation is negative for a data set where all values...

True or false

a. The standard deviation is negative for a data set where all values are negative.

b. A population with an average of 20 and variance of 16, has a coefficient of variation equal to the mean.

c.The standard deviation is a measure of dispersion that does not take into account all the observations of a data set.

d.The route of a data set is affected by the existence of extreme values.

Math   Statistics-And-Probability   
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Answer #1

a. The standard deviation is negative for a data set where all values are negative.

False :- because the standard deviation always positive. It is square root of sum of squares difference of value from mean.

b. A population with an average of 20 and variance of 16, has a coefficient of variation equal to the mean.

True

c.The standard deviation is a measure of dispersion that does not take into account all the observations of a data set.

False :- it takes all the values into account

d.The route of a data set is affected by the existence of extreme values.

True

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