How To Calculate The Sample Size Given The Confidence Level & Margin of Error

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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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www.video-tutor.net/
Full-Length Videos and Worksheets:
/ collections

Опубликовано:

18 июн 2020

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Комментарии : 89

@TheOrganicChemistryTutor Год назад

Next Video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-MUD390jtgQs.html Final Exams and Video Playlists: www.video-tutor.net/

@angelareddix5250 2 года назад

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!

@twizzler2235 3 года назад

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!

@lattekatt326 7 месяцев назад

Ong bro my test in 2 hours but im doing the crazy last minute grind

@hassanqurow 4 года назад

I'm from Somalia🇸🇴 Teacher really You're the Hidden Lecturer of our class God bless you

@Spectrojamz 4 года назад

The Greatest tutor Ever!!!

@mompsvybrathor1961 3 года назад

This is EXACTLY what I needed!!! Thank you so much :))

@fabulousangella Год назад

Thank you for post this video. You made it very easy to follow and understand.

@remelezagrafe3442 3 года назад

Thannnkkk youuu🥰.. I finally understand my modules in statisticss

@salsabillashafaadzra8109 3 года назад

Hi sir, can we use margin error / confidence interval 7% and is there any journal that refers it? Thank you

@dengsamuel4557 2 года назад

This man doing god’s work👊

@treemanfan7718 4 года назад

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

@bencantotimoteus9018 Год назад

can you explain in 6:25-6:30 why did you still round up to 385 even though your decimal is .16?

@inspirereality1 2 года назад

this man makes me feel so much smarter when bfr i tot i was the dumbest in class

@dimitriysevryukov1629 Год назад

Thank you very much !

@thanyaniinnocent940 4 года назад

I'm an Electrical Engineer but I'm stuck in this vedio because wow. This guy is a real genius tutor of everything

@scy3321 Год назад

vedio

@syrax6326 8 месяцев назад

You save me, I have report tomorrow. Thanks a lot!!!

@interstellaramar2330 3 года назад

Thank you so much

@rexj.bericojr.7364 2 года назад

Sir, what is the use of sample mean (84) in the first problem in computing the sample size?

@MegaMario0007 3 года назад

And why is the sample size the maximum? What would be the minimum sample size then.

@kuziji2k949 2 года назад

YES THANK U SO MUCH

@RufaMaeBactismo-qj7rw Год назад

Is there's a limitation or rules or pattern in choosing the value of p hat?

@halibut1249 4 года назад

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.

@melissaouali976 2 месяца назад

thank you so much!!

@reamabdulsalam524 Год назад

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

@mercychavula7139 3 месяца назад

God bless you Sir.

@veninanaigulevu8379 3 месяца назад

That was awsome, ty

@daoyan3685 Год назад

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

@TessJablonowskii Месяц назад

If only you were my professor

@harveydyer8119 2 года назад

thanks mate

@11almondkatherinevillegas56 2 года назад

how do you select the value of p-hat?

@seemanaeem8787 Год назад

OMG thank you

@pkmath12345 4 года назад

Gosh I am making business stat video series now! This video is a lot in the context of mine!

@veerakanneboina8086 3 месяца назад

If i was given with sample standard deviation, which test should i have to use t or z

@ikejohnshimbilinga5177 10 месяцев назад

Nah bro you're the GOAT

@nicholasjarka6124 4 дня назад

What is the name for the formula used to calculate the minimum sample size

@ninti180 4 года назад

This is the first time I've ever been this early 😂

@Spectrojamz 4 года назад

Me too😂😂

@scottw7472 4 года назад

For the second problem is there a way to solve for p-hat without using trial and error?

@josepha.cardenas9168 2 года назад

Yes, by using differential calculus and optimization.

@dengsamuel4557 2 года назад

Not really, we just gotta remember that the value is 0.25

@dimmatutorials2523 4 года назад

Very well explained #dimmatutorials

@aaravvarma1143 Год назад

What about for the minimum size?

@levisheffey9936 2 года назад

awesome.

@thagoonlprusiriyodlpru4174 4 года назад

Why did you choose 0.5 ?

@malloryfrangipane4394 3 года назад

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.

@_jaded Год назад

@@malloryfrangipane4394 scrolled way too far to find this answer

@Iginore 2 месяца назад

Because it is the highest

@safwaankhan_ 3 года назад

u saved my friends ass by helping me

@vardaankaushal8560 5 месяцев назад

Thanks a lot, it really helped

@laurenmarie9303 2 года назад

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.

@_jaded Год назад

Nah fr maybe I skipped too much but that max sample size of .5 makes no sense

@ramtea4639 2 месяца назад

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

@Alma333 2 года назад

where did the 5.367 come from?

@a.s9509 Год назад

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?

@cesarsar7323 Год назад

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

@markalvin8972 8 месяцев назад

the formular for n doesnt make sense to me, if mean =np and sd= square root of npq.

@BeanSprout-14 3 года назад

In 6:29 why does it rounded off to 385 instead of 384? Please answer asap need this for my exam tom

@williamescobar4254 2 года назад

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.

@arvinflores5316 3 года назад

where did you get the P hat formula, i didnt see that in the past video

@ikromlionnick2169 3 года назад

I didn't understand that formula too

@Nice.SHIGOTO 5 месяцев назад

p*(1-p) is the formula for the variance of the bernoulli distribution. but idk why he used this here 😢

@MegaMario0007 3 года назад

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%

@btsmochimi7924 Год назад

why did you use the sample mean when it said "all students"? Isn't it suppose to be the population mean?

@spctroy2002 9 месяцев назад

how did you get the values of z=1.96?

@issucn9504 6 месяцев назад

hi! i think this video can explain why the z value is 1.96 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sJyZ9vRhP7o.htmlsi=coNRTuPmaFTo9wKb

@scy3321 Год назад

if there are no confidence level and only asking for number of samples how can i solve that

@justsomegirlwithoutamustache 10 месяцев назад

Lol, same dilemma here

@lionelalan3621 Год назад

what if the margin of error is not given?

@aizamaeagustin9417 3 года назад

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.

@raquelghibellov.1484 3 года назад

same problem lmao

@maricarmencavazos4375 3 года назад

is confidence interval the same as confidence level

@johnlouis2687 3 года назад

@zikkirito Месяц назад

O Great sage 😂

@aidan8710 7 месяцев назад

I love you

@tanjonzou9840 Год назад

i like the way you teach, but you went too fast on this one

@Anything-pt6qk 3 года назад

I have a problem can you solve ?

@Anything-pt6qk 3 года назад

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.

@Anything-pt6qk 3 года назад

I hope you reply....

@wottatoparrior9500 2 года назад

GaMASS!!

@leyla5336 2 месяца назад

i love you oh my god

@akhtarjameel8365 4 года назад

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@isabirdisaplane 10 месяцев назад

ngl ur voice sounds hot

@tygrenvoltaris4782 2 года назад

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