Math Problem Statement
Solution
To analyze the dot plot, let’s break it down:
The number of text messages Reza sent each day is depicted on the dot plot for each day in the billing cycle. The x-axis represents the number of text messages (ranging from 1 to 13), and the dots represent the frequency of how many times that number of texts was sent on different days.
From the plot:
- There is a cluster of data between 6 and 8 messages per day, with 6 and 7 appearing more frequently than other values.
- There are fewer dots at the lower end (1, 2) and higher end (11, 12).
- The distribution is not symmetric. The bulk of the dots are concentrated in the middle (around 6-8 messages), and there are outliers at the high end (11, 12).
Answering the question:
The correct statement must describe both the shape and the center of the data accurately.
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Option A: The data is symmetric and shows that he typically sent about 6 to 8 text messages per day.
- False: The data is not symmetric, as there are more values clustered in the middle (6-8 messages) with some outliers at the higher end.
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Option B: The data is symmetric and shows that he sent 11 or 12 texts with the same frequency that he sent 1 or 2 texts.
- False: The data is not symmetric, and the frequencies at 11 or 12 are not the same as those at 1 or 2.
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Option C: The data is skewed and shows that he typically sent about 6 to 8 text messages per day.
- True: The data is skewed (slightly right-skewed), and most of the values are between 6 and 8.
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Option D: The data is skewed and shows that he sent 11 or 12 texts with the same frequency that he sent 1 or 2 texts.
- False: While the data is skewed, the frequencies at 11 or 12 are not the same as at 1 or 2.
Thus, the correct answer is C.
Would you like further explanation or more details on any part of this analysis?
Here are 5 related questions you might find useful:
- What is the difference between symmetric and skewed data?
- How do you determine the typical value from a dot plot?
- What does it mean if data is right-skewed or left-skewed?
- How does a dot plot visually represent frequency?
- What are outliers, and how can they affect the shape of a distribution?
Tip: When analyzing skewed data, pay attention to the direction where the data tails off. This helps in identifying whether the distribution is left-skewed or right-skewed.
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Math Problem Analysis
Mathematical Concepts
Statistics
Dot Plot
Data Distribution
Skewness
Formulas
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Theorems
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Suitable Grade Level
Grades 6-8