Best Measure of Center and Spread

Should we use the mean or the median to represent the center of the data?

(a)  

Given that the data is symmetric, which pair of measures should be used to represent the data?

• center: median

  spread: standard deviation

• center: mean

  spread: IQR

• center: mean

  spread: standard deviation

• center: median

  spread: IQR

Which measure of spread should be used to describe the distribution?

• standard deviation

• interquartile range

• range

• median

Because this distribution is ____________ to the ___________, we would use the ______________ for the center and the _____________ for the spread of the data.

• symmetric, middle, median, IQR

• skewed, left, median, IQR

• skewed, left, mean, IQR

• skewed, right, median, standard deviation

Which summary statistic should be used to compare the two data sets and why?

• The median and the interquartile range because they are normally distributed.

• The median and the interquartile range because they are skewed.

• The mean and the standard deviation because they are normally distributed.

• The mean and the standard deviation because they are skewed.

Which of the following is a measure of spread, or variability?

(select all that apply)

• Interquartile Range

• Standard Deviation

• Mean

• Median

• Range

Which statistic measures how spread out the data values are in a data set?

• mean

• mode

• maximum value

• standard deviation

Which measure of variability should you use?

• IQR

• standard deviation

Which measure of variability should you use?

• IQR

• standard deviation

Which measure of variability should you use?

• IQR

• standard deviation