Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

Mean of 50 observations was found to be 80.4 but later on, it was discovered that 96 was misread as 69 at one place. Find correct mean



Let the fiftieth observation be 69 and sum of the rest of the observations be S.
Then (S+69)=(80.4)50=4020.
But (S+96)=4047.
Then new mean is \frac{S+96}{50}=80.94.
2 5 2
50th observation be 69 and the rest observation be x
Then (x+69)=(80.4)50=4020. But (x+69)=4047). Then new mean is x+96\50=80.94
Ok thank you

This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Sum of all 50 observations = mean * no of observation = 80.4x 50 = 4020 now according to question 96 was misread by 69 So the new sum of observation = 4020 - 69 + 96 = 4020 + 27 = 40.47 now new mean = 4047/50 = 80.94 answer
2 3 2
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts