the mean of 200 items was 50.Later on, it was discovered that two were misread as 92 and 8 instead of 192 and 88. Find the correct mean.
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Answer:
203.60
Step-by-step explanation:
mean of 200 items = 50
total of 200 items = 200 x 50 = 10000
misread = 92, 8
original value = 192, 88
replacing the misread values with the correct values in total –
10000 - (92 + 8) + (192 + 88)
= 10000 - 100 + 280
= 10180
revised mean = 10180 ÷ 50
= 203.60
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