Question

Asked Jan 30, 2020

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Yesterday Al recorded 5 data values, and the mean of those values was 90. Today he realized the data value of 80 should have been a 50. What is the actual mean?

Step 1

Given data

Mean of 5 data values = 90

Data value 80 was actually 50

Mean is given by

Step 2

Data value 80 is actually 50

So, we need to subtract 80 from sum of observations...

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