Statistics and Analyzing Data

Alexandra worked 5 hours on Monday, 4.5 hours on Tuesday, and 2.5 hours of Wednesday. Which is closest to the mean number of hours she worked over the three-day period?

• 3 hours

• 4 hours

• 5 hours

• 6 hours

Which of the following is a measure of variability?

• mode

• MAD

• Median

• Mean

The number of nachos sold at the football concession stand is shown in the line plot.  Describe the shape of the distribution.  Identify any clusters, gaps, peaks and outliers.

• The distributions is symmetric.  There is a cluster from 23-27 and from 29-3 1, and a peak at 17.  There's a gap between 20 and 23.  There are no outliers.

• The distribution is not symmetric. There is a cluster from 23-27 and from 29-31, and a peak at 27.  There's a gap between 20 and 23.  There are no outliers.

• The distribution is not symmetric.  There is no cluster.  There is at peak at 24 and 27.  There's a gap from 23-27.  The outlier is 20.

• The distribution is symmetric.  There is a clus from 29-32 and a peak at 24.  Theris a gap between 20 and 23.  There are no outliers.

Look at the dot plot. Notice there are groups of data around the numbers 0, 20, and 40. What do we call those groups of data?

• Outliers

• Clusters

• Gaps

Which statement best describes the data shown in the dot plot?

• The peak of the data is at 35

• The data are clustered from 30 to 32

• The data distribution has gaps

• The data distribution is symmetrical

What value is the lower quartile (Q1)?

• 66

• 58

• 60

• 64

Which grade describes the center of data?

• 65

• 75

• 60

How many students received a score in the 80's?

• 2

• 10

• 14

• 27

How many scores are listed in this Stem and Leaf Plot?

• 3

• 9

• 6

• 18

In how many games did the team score more than 20 points?

• 8

• 7

• 10

• 9