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4 cards from this section. Quick, good the night before a test.
What is the mean of the following numbers: 3, 5, 8, 10?
Add the numbers and divide by how many there are.
If the midpoint of a class interval is 50 and the frequency is 10, what is the total from this class?
You multiply midpoint by frequency.
What is the formula for mean using the direct method?
Remember, you are computing an average.
True or False: The indirect method of computing mean is always more accurate than the direct method.
Think about which situations a method might be better suited.
Using a frequency table with intervals from 100-200, 200-300, and 300-400 with respective frequencies of 20, 30, and 50, calculate the mean using both methods. Provide detailed calculations.
Analyze both approaches, the calculations should end up being the same.
Examine a scenario where using the indirect method might yield complexities. Discuss these scenarios and implications.
What could go wrong when coding the data?
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