A set of N = 10 scores has a mean of µ = 50. If 20 points are added to one of the scores, what is the new value for the population mean?Group of answer choices
Question
A set of N = 10 scores has a mean of µ = 50. If 20 points are added to one of the scores, what is the new value for the population mean?Group of answer choices
Solution
Sure, let's solve this step by step.
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Calculate the original total sum of the scores:
- The mean (µ) of the scores is 50.
- The number of scores (N) is 10.
- The total sum of the scores can be calculated as:
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Add 20 points to one of the scores:
- When 20 points are added to one of the scores, the new total sum of the scores becomes:
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Calculate the new mean:
- The number of scores (N) remains the same, which is 10.
- The new mean (µ') can be calculated as:
So, the new value for the population mean is 52.
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