Question

the histogram shows the results of a survey asking students how many video games they currently own. how many observations were used to create the display? video game ownership number of video games 0 - 9 10 - 19 20 - 29 30 - 39 40 - 49 number of students 10 8 6 4 2 0

Explanation:

Step1: Identify bar - heights

The bar - heights for the intervals 0 - 9, 10 - 19, 20 - 29, 30 - 39, 40 - 49 are 4, 9, 10, 3, 1 respectively.

Step2: Sum the bar - heights

The total number of observations is the sum of the frequencies of all intervals. So, \(4 + 9+10 + 3+1\).
\(4+9 = 13\), \(13+10=23\), \(23 + 3=26\), \(26+1 = 27\).

Answer:

27