Math Problem Statement
Solution
Based on the frequency distribution given in the table, let's analyze the data to choose the correct histogram and determine if the distribution appears to be approximately normal.
Frequency Distribution:
- Class A (39–44): Frequency = 1
- Class B (45–50): Frequency = 3
- Class C (51–56): Frequency = 7
- Class D (57–62): Frequency = 10
- Class E (63–68): Frequency = 5
- Class F (69–74): Frequency = 3
- Class G (75–80): Frequency = 2
This distribution shows that the highest frequency is centered around class D (57–62) and the frequency gradually decreases as we move away from this center.
Analysis of the Histograms:
Comparing this data pattern with the histograms provided in the image:
- Histogram D most accurately represents this pattern. It shows a peak around the middle class (D), with frequencies decreasing as we move to either side of the peak, which matches the given data.
Determining Normality:
A normal distribution typically appears as a symmetric bell-shaped curve, where most of the values cluster around a central peak and taper off equally on both sides. While the data has a peak in the center (class D), the decrease in frequency is not perfectly symmetric. However, it still follows a somewhat bell-shaped curve.
Based on the options provided, the answer to whether the data is approximately normal would be:
- Option D: Yes, it is approximately normal.
Would you like more details or have any other questions?
Related Questions:
- What is the definition of a normal distribution?
- How do you interpret the symmetry of a histogram in statistics?
- What are some common characteristics of data that is not normally distributed?
- What is the role of the mean and standard deviation in a normal distribution?
- How can you check if a distribution is normal using statistical tests?
Tip: When analyzing histograms, always look for the shape of the distribution and check if it resembles a bell curve for normality!
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Math Problem Analysis
Mathematical Concepts
Statistics
Frequency Distribution
Histograms
Normal Distribution
Formulas
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Theorems
Normal Distribution Characteristics
Suitable Grade Level
Grades 9-11
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