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To determine the number of observations represented in Levi's dataset, we need to add up the number of posts for each range shown in the bar chart.
Looking at the data provided:
- The range of 0 to 1 shows 4 posts.
- The range of 2 to 3 shows 3 posts.
- The range of 4 to 5 shows 1 post.
- The range of 6 to 7 shows 5 posts.
Adding these observations together, we get:
4 + 3 + 1 + 5 = 13
Therefore, Levi's dataset represents 13 observations.