A local marketing company did a survey of 30 households to determine how many devices the household contained that family members watched video on (i. e. TV's, tablets, smart phones, etcetera). The dot plot of the
responses is shown below.
10
2.
8
Number of Screens Capable of Watching Video
1. How many households have three devices capable of showing video on them?
(1) 1
(3) 7
(2) 2
(4) 5
2. More households had 4 devices to watch video on than any other number. Which of the following is closest
to the percent of households that have 4 devices?
(1) 22%
(3) 27%
(2) 34%
(4) 45%
3. The marketing company would like to claim that the majority of households have either 3 or 4 screens
capable of watching video on. Does the information displayed on the dot plot support this claim? Explain
your reasoning
4. The same marketing company then surveyed 30
households that contained at least one teenager. The
dot plot for the video enabled devices is shown below.
The mean number of screens for the first survey was
3.4. Based on the second dot plot, do you think its
mean will be higher or lower? Explain.
0
15
5
10
Number of Video Enabled Devices
COMMON CORE ALGEBRA I, UNIT #10 - STATISTICS -LESSON #1
eMATHINSTRUCTION, RED HOOK, NY 12571, © 2013