How To Calculate The Sample Size Given The Confidence Level & Margin of Error
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- čas přidán 8. 09. 2024
- This statistics video tutorial explains how to calculate the sample size given the confidence level and margin of error.
Introduction to Statistics: • Introduction to Statis...
Introduction to Probability:
• Introduction to Probab...
Central Limit Theorem:
• Central Limit Theorem ...
Standard Error of The Mean:
• Standard Error of the ...
_____________________________________
Confidence Intervals & Margin of Error:
• How To Find The Z Scor...
Find The Z-Score Given Confidence Interval:
• How To Find The Z Scor...
How To Calculate The Sample Size:
• How To Calculate The S...
Student's T-Distribution:
• Student's T Distributi...
Confidence Interval-Population Proportion:
• Finding The Confidence...
Chebyshev's Theorem:
• Chebyshev's Theorem
_____________________________________
Hypothesis Testing - Null & Alternative:
• Hypothesis Testing - N...
Type I and Type II Errors:
• How To Identify Type I...
One Tailed and Two Tailed Tests:
• One Tailed and Two Tai...
Test Static For Means & Pop Proportions:
• Test Statistic For Mea...
Hypothesis Testing Problems:
• Hypothesis Testing Pro...
____________________________________
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Teacher really
You're the Hidden Lecturer of our class
God bless you
this came in clutch.... just before the exam too, definitely gave it a thumbs up. keep up the hard work bro, people like me highly appreciate it!
Ong bro my test in 2 hours but im doing the crazy last minute grind
Thank you posting this! I looked through so many videos to try to solve my statistics program and you broke it down so well and so efficiently!
The Greatest tutor Ever!!!
May I make a suggestion?? When you print out the problem to be solved at the top of the screen, could you use a larger typeface?? I watch these vids on a cell phone and sometimes the small print is hard to read. Thanks, and really enjoy your vids and problem solving simple explanations.
Could you make a rated video with more advanced problems for the sat !?!? Thank you so much. This topic on this video is also on the sat
This man doing god’s work👊
For the second problem is there a way to solve for p-hat without using trial and error?
Yes, by using differential calculus and optimization.
Not really, we just gotta remember that the value is 0.25
I'm an Electrical Engineer but I'm stuck in this vedio because wow. This guy is a real genius tutor of everything
vedio
Thank you for post this video. You made it very easy to follow and understand.
this man makes me feel so much smarter when bfr i tot i was the dumbest in class
im still so confused. I used .5 for my proportion and it didnt work. Why is .5 proportion the max here???? please explain more thoroughly, I really dont understand.
Nah fr maybe I skipped too much but that max sample size of .5 makes no sense
Maybe it has 50-50 chances of being a failure or the exact opposite.
Maybe, the main reason is to minimise the error, both the type
I think
You save me, I have report tomorrow. Thanks a lot!!!
Thannnkkk youuu🥰.. I finally understand my modules in statisticss
Is there's a limitation or rules or pattern in choosing the value of p hat?
Why did you choose 0.5 ?
its the proportion. if you are unsure of the proportion, it is suggested to use 50% or 0.5 to maximize the study you are conducting.
@@malloryfrangipane4394 scrolled way too far to find this answer
Because it is the highest
And why is the sample size the maximum? What would be the minimum sample size then.
The minimum sample size would technically be 0. That's how many people we'd need to ask if the probability of a yes/no answer is 100/0 or 0/100. But since we can't know this probability in advance, this is not much use. The maximum sample size means we hedge our bets and make sure we can make the prediction no matter what the probability of yes/no is.
Hi can you please show us how to calculate the confidence interval if we have two variables X and Y or two companies we need to get the difference between the proportion of them thanks hope you upload this video soon I have exam and I don’t like satistics I can understand it only from you thanks
If only you were my professor
God bless you Sir.
Nah bro you're the GOAT
This is EXACTLY what I needed!!! Thank you so much :))
can you explain in 6:25-6:30 why did you still round up to 385 even though your decimal is .16?
Because the question is what is the maximum sample size which means what is the lowest sample size that makes it certain that we can determine the proportion with the given confidence and margin of error even if the standard deviation is as high as it can be (if the probability of yes/no answers turns out to be 50/50). Since this value turns out to be 384.16, this means that 384 people will barely not be enough if the probability is 50/50 so we need to survey 385 to be sure.
Gosh I am making business stat video series now! This video is a lot in the context of mine!
Thank you very much !
Thanks a lot, it really helped
thank you so much!!
how do you select the value of p-hat?
Hi sir, can we use margin error / confidence interval 7% and is there any journal that refers it? Thank you
Very well explained
#dimmatutorials
What about for the minimum size?
Thank you so much
where did you get the P hat formula, i didnt see that in the past video
I didn't understand that formula too
p*(1-p) is the formula for the variance of the bernoulli distribution. but idk why he used this here 😢
YES THANK U SO MUCH
That was awsome, ty
thanks mate
OMG thank you
Sir, what is the use of sample mean (84) in the first problem in computing the sample size?
u saved my friends ass by helping me
This is the first time I've ever been this early 😂
Me too😂😂
awesome.
If i was given with sample standard deviation, which test should i have to use t or z
What is the name for the formula used to calculate the minimum sample size
what if the sample size must be equal to 20 but the calculated sample sizes are 9.5 and 11 is it round up or down
In the first example you use an absolute error, while in the second example a relative error, in the same formula. This seems contradictory. An error of 5.3 on 84 is 6%
why did you use the sample mean when it said "all students"? Isn't it suppose to be the population mean?
usually when we round numbers, given that the number after the decimal point is 5 or higher, then we round the number up. Otherwise, we would round the number down. So, I am confused why you round up the number. Does the assumption of having maximum numbers for n negate this rule?
For sample size you ALWAYS round UP! If he rounded down to 30, you wouldn't meet the needed sample size. So going up gives you the needed value! 153.26 would be 154. Remember: round up for sample size
the formular for n doesnt make sense to me, if mean =np and sd= square root of npq.
if there are no confidence level and only asking for number of samples how can i solve that
Lol, same dilemma here
In 6:29 why does it rounded off to 385 instead of 384? Please answer asap need this for my exam tom
Totally late to respond and answer your question since its been at least a year, but he rounded up because you can't have 384.16 students. It has to be 385.
where did the 5.367 come from?
i like the way you teach, but you went too fast on this one
how did you get the values of z=1.96?
hi! i think this video can explain why the z value is 1.96 czcams.com/video/sJyZ9vRhP7o/video.htmlsi=coNRTuPmaFTo9wKb
What if the question is
Highest 13.8 while lowest is 13.4
Margin of error of 0.025 and confidence level 99%. Find the sample size n that he needs.
Please calculate this. I really need.
Thank you.
same problem lmao
O Great sage 😂
i love you oh my god
I love you
what if the margin of error is not given?
is confidence interval the same as confidence level
no
GaMASS!!
I have a problem can you solve ?
The University have a total of 387 athletes participating in different
sports. If 185 of them take sport and wellness course, 32 take education
courses, 68 take marketing and management, 52 take computer studies
while the remaining 50 take accountancy, find the number of samples from
each category given that 75 athletes are to be chosen as sample.
I hope you reply....
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