ck12.org normal distribution problems: z-score | Probability and Statistics | Khan Academy



Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now:

Z-score practice

Practice this lesson yourself on KhanAcademy.org right now:

Watch the next lesson:

Missed the previous lesson?

Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you’re going to be challenged AND love it!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We’ve also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to KhanAcademy’s Probability and Statistics channel:

Subscribe to KhanAcademy:

source

32 Comments

  1. Sir I would like to ask a question. I see the answer for c gave us a decimal. Does it mean in Z-score Normalization we can't round up the decimals? Please I am new and which to know more. thank you.

  2. Found this video very helpful as it will be on my CPCE exam for graduation! I’m just a little confused regarding the answer (A). Is it because it’s closer to the mean? Sorry I know it’s a very silly question and yes the video was helpful I just don’t understand why (A) is the answer ! 🥺 please help 🙏🏼

  3. /z-skors({4:2 35deg relayz snp shoch}).in my FLIRRON trnst({mat'''6x 3-D therm RxVt''}) Vdz stckrs(kf' f-stps) slimer cannons anciench bttl shps aerospace fraems //4'({zF}) in 360deg sekts tricg brnchs spidy ^*3Aln ABV serial lnx({Rxz-skors f-stps}) anciench Ei K' WVkxm''' Braebus slimer cannons – shp courses stylist /

  4. Who ever you are teaching this concept, I hope the gods smile on you lol! Why is it that no one could explain this the way you did!? Thank you so much for having the ability to teach as if you're teaching a child! You are so awesom!

Leave a Reply

Your email address will not be published. Required fields are marked *

You might like

© 2026 Cantinho do Vídeo - WordPress Video Theme by WPEnjoy