I'm not really sure what your asking...If you're looking for a sampling distribution, you'd use the Central Limit Theorem. I have a video covering sampling distributions. (I can't include the link in this comment). If you don't have boundaries, you can't really calculate probabilities, but you can calculate the mean and standard error of the mean and determine the shape of the graph based on the original population.
Thank you for this video! So easy to understand. In problem B, the upper boundary wouldn't be 200 because the problem states less than 200. The upper boundary would be 199 because that's the greatest number possible while being less than 200. X is less than or equal to 199.
In 5 minutes and 15 seconds you saved the first half of my semester! Thank you!
listen i understand that you made this like years ago, and i just need you to know you have helped tremendously!
Thank you, thank you, thank you. OMG. Why can't everybody else teach like this? 2 hours looking at a book ... 3 minutes with this video.
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You are the sole reason I got through statistics
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- Dying stats student
Thank you, Thank you! I’ve found 2 of your videos and they were both perfect for what I was needing!
my teacher is awful. You are the only thing that will get me through my stat classes this summer. Thank you so much for this!
Really appreciate this for my Descriptive Statistics class!
i know you made this a long time ago but THANK YOU. I always come to you channel for help.
Thank you for doing this on the older software version, I didn't know I could just use a comma :)
thank you so very much for this video, this stuff has been so frustrating to try to learn with no professor. thank you thank you thank you
YOU ARE AWESOMELY BETTER THAN HLS!!!! THANK YOU FOR SAVING MY LIFE!
This video, saved me a whole section for a statics class. :,)
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haha, that may be the best comment ever :)
I'm not really sure what your asking...If you're looking for a sampling distribution, you'd use the Central Limit Theorem. I have a video covering sampling distributions. (I can't include the link in this comment).
If you don't have boundaries, you can't really calculate probabilities, but you can calculate the mean and standard error of the mean and determine the shape of the graph based on the original population.
Hallelujah!!! This was SO VERY HELPFUL!!
This video is so good! Thank you so much for making it.
you have to know, Dr. Godblod, that you have helped so many students and you are so appreciated!!! QUEEEEEEN
Aw :) Thanks!
Kudos for using Mega Man X as an example, and for showing me how to use the normal probability function on a TI-84. Cheers. ^_^
If they give you the variance, use the square root of the variance. Since standard deviation = squareroot(variance).
This video is great!
This video saved my life.
Thank you so much, you saved me !
Thanks for that?!! Helped me a lot
Thank you!! You're a life saver!
This video was very helpful. Thanks:)
what about greater than or equal to
Great Job
Excellent video!
Not if you put in the mean and standard deviation as the third and forth values.
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This is incredibly helpful, thank you!!!!
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when do you know when to calculate the z score in these types of questions?
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Life saver!
Thank you! this really helped.
How do you find the normalcdf button on the ti-30xs calculator?
how would i find the probability if the question asks "at least"
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Thanks, you saved my grade!
so with that probability do you multiply by 100 to get the percentage?
What if they ask you for the variance instead of the standard deviation?
exam tomorrow
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why "ERR:SYNTAX" occurs when i use insert negative numbers?? plz help!
you are amazing thank you
What will be the probability exactly at 200
You had me at Megaman X
How do you get the same answer on an Excel spreadsheet
Thank you sooo much!!
thank you
dont you have to convert the x to z and then do that?
how to solve when a standard deviation is not given.?
what do I do if x shows up as a decimal? .45 , mean is 100 and Stdv is 15
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thank you. the 'z' thing was not making any sense to me. I just pay attention to probability of x
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mahvelously simple!
what if the problem says " If 144 women are randomly selected" how do i put that in the calculator. please help
I'm following the steps using my TI84, but in example c., I get an answer of (-0.6716). not sure why.
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What if its greater than or equal to
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You're welcome :)
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Thank you for this video! So easy to understand. In problem B, the upper boundary wouldn't be 200 because the problem states less than 200. The upper boundary would be 199 because that's the greatest number possible while being less than 200. X is less than or equal to 199.
What if it is already a standard normal random variable? Can we still find that using TI-84?
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with mean of 23 and standard deviation of 3.5 the probability of randomly picking 10 students with average of less than 24 years old.