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Statistics Practice Test 1
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© examsnet.com
Question : 23
Total: 37
Mean of 25 observations is 72. Find the valueof the 13th observation, if the mean of thefirst 13 observations is 64 and the mean oflast 13 observations is 78.
46
96
27
58
102
Validate
Solution:
👈: Video Solution
Sum of 25 observations = 1,800
Sum of the first 13 observations = 832
Sum of the last 13 observations = 1,014
Value of the 13th observation = 832 + 1,014 - 1,800 = 46
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