Question

determining the number of observations. 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?

Explanation:

Step1: Identify frequency of each class

From the histogram, frequencies for intervals 0 - 9, 10 - 19, 20 - 29, 30 - 39, 40 - 49 are 4, 8, 7, 2, 1 respectively.

Step2: Sum up frequencies

Total number of observations = 4 + 8+7 + 2+1

Answer:

22