Mean value of weight of a group of 10 boys was found to be 18.2 kg. Later it was found that weight of one of the boys was wrongly recorded as 2.0 kg that should have been 20 kg. The true mean weight of the group is:
Correct Answer: 20 kg
Description: Mean (Average(e): Is obtained as sum of all values divided by the no. of values Mean = [?]x/n In the given question, = 18.2 kg and n=10 Thus [?]x = 182 Also, weight of one of the boys was wrongly recorded as 2.0 kg that should have been 20 kg True [?]x= 182 + (20- 2.0) = 200 So true Mean =[?]x(true)/n = 200/10 = 20.0 kg.
Category:
Social & Preventive Medicine
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now