Open study

is now brainly

With Brainly you can:

  • Get homework help from millions of students and moderators
  • Learn how to solve problems with step-by-step explanations
  • Share your knowledge and earn points by helping other students
  • Learn anywhere, anytime with the Brainly app!

A community for students.

PLEASE HELP!!!!!!!!! (Medal will go to best answer.) Use the standard deviation to identify any outliers in the given data set: {3,4,5,6,8,9,10,30} Please explain why there is or isn't an outlier and how you'd determine if there is one or not. Thank you! =)

See more answers at
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Join Brainly to access

this expert answer


To see the expert answer you'll need to create a free account at Brainly

By the way - the variance is: 66.035
First, find the standard deviation of the data set. To do this, find the mean, then find the distance each point is from the mean, square and sum those distances, and square root the total. Once you have that, check how many standard deviations the data points are from the mean. There's no set definition for what makes a point an outlier; your class may have specified a number of standard deviations that qualifies. Inevitably, with this data set, the answer will be that 30 is an outlier, but you'll need to show why. Edit: Since you have the variance, you can just take the square root of the variance to find the standard deviation.
Wow! Thanks so much. I found that the variance is: 8.13 - my class didn't specify if this would classify it as an outlier. What do you think?

Not the answer you are looking for?

Search for more explanations.

Ask your own question

Other answers:

*sorry I meant that 8.13 is the Standard Deviation
BTW - the mean of the original data set was: 9.375
Well, since you know the standard deviation, and you know the mean, you can find how many standard deviations away from the mean each point is. At some cutoff, you'll say that a point is an outlier if it's more than a certain number of standard deviations away from the mean. With this data set, 30 is more than 2 standard deviations away from the mean, so it's definitely an outlier.
Okay, perfect! Thank you so much! I really appreciate your thoroughness! If I could give you another medal, I would. :)

Not the answer you are looking for?

Search for more explanations.

Ask your own question