IM1 Unit 1 Benchmark Std. 3

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

• The Median, because the shape is Skewed.

• The Mean, because the shape is Symmetrical

Which of the following best describes the shape of the distribution?

• skewed left

• skewed right

• uniform

• symmetrical

Which measure should be used to represent the center of the data?

• center: median, because its shape is Skewed

• center: mean, because its shape is Symmetrical

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 measure of center will be the smallest?

(Remember which one pulls toward the tail)

• median

• mean

• mode

When is the median a better choice for measure of center compared to the mean?

• When the distribution is symmetric

• When the distribution is almost symmetric

• When the distribution is strongly skewed

• When there are a lot of data values

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

• mean

• mode

• maximum value

• standard deviation

a measure of variability between the first and the third quartile

• range

• dot plot

• interquartile range

• measure of central tendency

A data value that is much higher or much lower than the other values in a data set.

• outlier
• inlier
• immalier
• sublier

Find the interquartile range using the following.
Minimum:  1
Q1:  3
Median:  5
Q3:  7
Maximum:  9

• 8
• 4
• 5
• 10