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Techniques for random sampling and avoiding bias | Study design | AP Statistics | Khan Academy

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Techniques for random sampling and avoiding bias. View more lessons or practice this subject at http://www.khanacademy.org/math/ap-statistics/gathering-data-ap/sampling-methods/v/techniques-for-random-sampling-and-avoiding-bias?utm_source=youtube&utm_medium=desc&utm_campaign=apstatistics AP Statistics on Khan Academy: Meet one of our writers for AP¨_ Statistics, Jeff. A former high school teacher for 10 years in Kalamazoo, Michigan, Jeff taught Algebra 1, Geometry, Algebra 2, Introductory Statistics, and AP¨_ Statistics. Today he's hard at work creating new exercises and articles for AP¨_ Statistics. Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc
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Text Comments (21)
Mishi.Squshi UwU (5 months ago)
Whoever disliked this is jealous of how Genius he is.
Justin De Love (6 months ago)
What is best depends a lot of how often you survey. In the long run a random selection from the whole population should be the most useful as it will show trends very clearly.. For a one off survey I would go with clusters, which give a good snap shot but is less likely follow trends accurately, because the randomly selected clusters may cancel each other out. Stratified is the safest choice as it broad enough to show trends, and narrow enough to make a quick reading. By narrow I mean it less subject to periodic unusual peaks and troughs of randomness. Really girls and boys should be filtered as whatever method is used the division can be made afterward. If show significant deviation from the whole that can be taken into account. The same is true of other pairs of Opposition, older younger, richer, poorer etc. So my ideal would be to brew up a random survey of the whole regularly and then filter the results to taste.
IAteGlue Today (1 month ago)
You get the pattern xd
IAteGlue Today (1 month ago)
And this one.
IAteGlue Today (1 month ago)
And I liked this one also.
IAteGlue Today (1 month ago)
I liked my own comment lol
IAteGlue Today (1 month ago)
No clue what you said but sounds very smart.
Charlie Hill (9 months ago)
penile shaft
Kavish Kartha (10 months ago)
I have a math test tomorrow and I watched this since I had no clue what a sample was. This was very helpful. I completley understand what a sample is.
Kavish Kartha (10 months ago)
*completely. My bad!
rosa zaid (11 months ago)
I have my exams after a month and I've recently come across a question relating to this, " describe how you would carry out quadrat method" pls answer this for me,
0nly me (10 months ago)
You will use two random numbers which will be used as coordinates. Then place a quadrat at the coordinate and collect your data/sample from this particular place.
stanzin jidey (1 year ago)
thanx for helping out,it'was really v. informative..!
SYED MUQTADIR (2 years ago)
FB BCBS be set be FB BB for few be at be fun be me from I like t turtle s
SYED MUQTADIR (2 years ago)
Mr Kolber's Teaching (2 years ago)
Good stuff! An important aspect of modern data collection.
Mubasshir (2 years ago)
please use white background. and that is comfortable for eyes.
Charlie Hill (9 months ago)
be quiet
Kavish Kartha (10 months ago)
My dude just invert colors on your PC by using high contrast!
Intruder (1 year ago)
no need to be white washed
zain (2 years ago)
Muhamaad Nafiz Ahmed black backgrounds are actually easier on the eyes if the pen has nice contrast

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