Math Problem Statement
how do you find the median?
Solution
To find the median for the given data in the table, follow these steps:
Step-by-Step Process:
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Understand the Median:
- The median is the middle value of the data when arranged in ascending order.
- If the total frequency () is odd, the median is the -th value.
- If is even, the median is the average of the -th and -th values.
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Identify the Total Frequency ():
- From the table, add up the frequencies:
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Find the Median Position:
- Since (even), the median will be the average of the 30th and 31st values.
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Determine the Cumulative Frequency: Create a cumulative frequency column to locate the 30th and 31st values:
- For :
- For :
- For :
- For :
- For :
- For :
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Locate the Median Scores:
- The 30th and 31st values fall within the cumulative frequency range of , which corresponds to a score of 4.
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Calculate the Median:
- Since both the 30th and 31st values have the same score of 4, the median is:
Final Answer:
The median score is 4.
If you have more questions or need clarification, let me know! Here are related questions you might find helpful:
- How do you calculate the mean for grouped data like this?
- How can you visualize the cumulative frequency with a graph?
- What happens if the total frequency is odd?
- How do you interpret mode, mean, and median in such a dataset?
- How can you find the range of the scores from the data?
Tip: Always organize cumulative frequency carefully to avoid errors when locating the median.
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Math Problem Analysis
Mathematical Concepts
Statistics
Median
Cumulative Frequency
Formulas
Median position for even n: (n/2)-th and (n/2 + 1)-th values
Cumulative frequency: Sum of all frequencies up to the current score
Theorems
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Suitable Grade Level
Grades 7-10