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Quant Quill
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Добавлен 5 ноя 2017
How-to videos on statistics and quant topics, using Excel, the standard normal distribution table, and the Casio and TI graphing calculators.
Casio: Hypothesis test for correlation using Test-T-Reg
Conducting a two-tailed hypothesis test for population correlation on the Casio graphing calculator. Output will include p-value, t test statistic, and r (sample correlation coefficient). Also shows how to use the Inverse T function to get the t critical value. We'll apply 2 decision rules to the results, reject H0 if p-value is less than alpha, and reject H0 if t test is less than -t alpha/2 or greater than +t alpha/2.
Просмотров: 2 609
Видео
NSPIRE: Hypothesis test for correlation using LinRegTTest
Просмотров 1,1 тыс.6 лет назад
Conduct a two-tailed hypothesis test for correlation (H0: rho = 0, HA: rho =/ 0). The NSPIRE output includes sample correlation coefficient (r), p-value, t test statistic and so much more. We'll conduct the test at alpha = .05 and use 2 decision rules, reject H0 if p-value _ alpha, and reject H0 if t test _ -t alpha/2 or t test _ t alpha/2. Example includes using inverse t function to get the t...
TI-83/84: Chi square critical values using Solver and X2cdf
Просмотров 28 тыс.6 лет назад
The TI-83/84 doesn't have a chi square inverse function, so when we need to get chi square critical values, we can use the Solver function combined with chi square cdf and tell the calculator to solve for the "X" chi square value that has some area to the left or right of it. All we need to know are the confidence level or alpha, and the n or df. In the video, I show the example of finding lowe...
TI89: p-value with chi-square cdf and critical value with inverse chi-square
Просмотров 2,8 тыс.6 лет назад
How to get p-value and critical value in the chi square distribution, using chi square cdf function and inverse chi square function. Both functions are in the F5: Distributions menu. Chi square cdf is #8. For inverse chi square, go into the Inverse sub-menu (#2) then choose chi-square (#3). Video is geared toward chi square GOF and two-way tests, but works the same for hypothesis tests and CIs ...
TI-89: One-Way ANOVA
Просмотров 2,3 тыс.6 лет назад
How to run one-way analysis of variance on the TI-89 Titanium. Shows how to enter data in lists, then access the ANOVA menu, enter the list names, run the list and identify F test and p-value.
Casio: One-Way ANOVA, entering data in List 1, List 2
Просмотров 9 тыс.6 лет назад
How to run one-way ANOVA in the Casio. Entering data in lists for ANOVA is different than in the TI. This video shows how. List 1 will be sample numbers. We enter the sample number as many times as we have observations in the sample. For example, if sample 1 has 5 items, enter "1" five times. If sample 2 has 5 items, then enter "2" five times. And so on. List 2 will be the sample values. Enter ...
TI83/84: F Critical (Inverse F) using Solver and Fcdf
Просмотров 24 тыс.6 лет назад
Need an F critical value? For example, you're running a hypothesis test for 2 population variances or running regression, and you're being asked to compare the F test statistic with the F critical value. The TI-83 and TI-84 don't include an inverse F function, but we can use Solver and the Fcdf function to solve for F critical. Or add in your own invF program (short video for adding a 4-line pr...
Casio: F critical value using inverse F function
Просмотров 4,7 тыс.6 лет назад
How to compute the F critical value in a Casio graphing calculator when given signifcance level and the degrees of freedom from each sample.
Casio: Inverse t function to find t critical value
Просмотров 31 тыс.6 лет назад
Using the Casio graphing calculator to find a t critical value when given alpha and degrees of freedom. Note that Casio expects you to enter area to the RIGHT of the t critical value, therefore if you have a left-tailed test with alpha = 0.05 (for example) you would enter 0.95 as your area. The video has examples for right-tailed, two-tailed and left-tailed t critical values.
TI-89 2-SampFTest (test of population variances) and inverse F
Просмотров 1,2 тыс.6 лет назад
Using the TI-89 calculator's 2-SampFTest and inverse F functions. The 2-SampFTest is used for hypothesis tests for equality of 2 population variances, and returns an F ratio (F test statistic) and p-value. The inverse F is used to get critical values for all sorts of tests, including the equation of 2 population variances, ANOVA and regression. In the inverse F function, for area, use 1-(alpha/...
Casio: Finding chi square value given alpha and df
Просмотров 2,3 тыс.6 лет назад
How to use the inverse chi square function on a Casio graphing calculator. Useful for running a hypothesis test for a population variance, when given alpha and degrees of freedom. To find a chi square value for a confidence interval, make sure you look for area to the right of the lower tail and the upper tail chi square. Casio always wants area to the right for this function.
TI89: Paired Samples T Test and T Interval
Просмотров 3,2 тыс.6 лет назад
How to run a hypothesis test and construct a confidence interval for paired samples (also called dependent samples, or matched pairs).
Casio: Z test (1-sample hypothesis test, sigma known)
Просмотров 2,3 тыс.6 лет назад
Conducting a hypothesis test on a Casio graphing calculator. Using the one-sample z test to compute z test statistic and p-value.
TI83/84: DIY Inverse chi-square program
Просмотров 23 тыс.6 лет назад
The inverse chi square function isn’t pre-loaded on TI-83 and TI-84 calculators. Inverse chi square returns a critical value we use in hypothesis tests and confidence intervals for population variance. Here is a simple 3-line program for inverse chi square you can enter in your calculator. If you find this video helpful, give it a thumbs up. Go to PRGM, NEW, 1. Create New At the Name = prompt, ...
TI-83/TI-84 DIY InvF function
Просмотров 15 тыс.6 лет назад
TI-83 and TI-84 calculators lack the inverse F function. Inverse F uses alpha, D1 and D2 degrees of freedom to solve for the critical value in hypothesis tests for 2-population variance and ANOVA. Here is a simple, 4-line program to add that functionality to your calculator. Steps to add INVF: Go to PRGM, NEW, 1. Create New At the Name= prompt, the cursor is in Alpha mode. Enter a short name su...
Casio fx-9860G: Probability with Sampling Distribution of the Mean
Просмотров 6 тыс.6 лет назад
Casio fx-9860G: Probability with Sampling Distribution of the Mean
Linear trend forecast in Excel (2:08)
Просмотров 31 тыс.6 лет назад
Linear trend forecast in Excel (2:08)
Calculating weighted mean with Casio fx-9860G or fx-9750G
Просмотров 3,2 тыс.6 лет назад
Calculating weighted mean with Casio fx-9860G or fx-9750G
Casio fx-9860G: Probability with the Poisson Distribution
Просмотров 11 тыс.6 лет назад
Casio fx-9860G: Probability with the Poisson Distribution
Casio fx-9860: Discrete Probability, E(x) and standard deviation
Просмотров 9 тыс.6 лет назад
Casio fx-9860: Discrete Probability, E(x) and standard deviation
Probability with the standard normal table (P(0 to z))
Просмотров 96 тыс.6 лет назад
Probability with the standard normal table (P(0 to z))
thank you so much !!!
I just wanted to take a moment to express my deep appreciation for you, the way you started with those essential notes, especially about the different tables, was incredibly helpful. As a student, it’s easy to get lost without understanding those nuances, and your clear explanation really made everything click for me. what stands out the most is the calm and unhurried way you explain things. It’s like you genuinely care about helping others understand, and it makes a world of difference. Even though the video is 6 years old, it’s still far better than many recent ones out there. Your approach to teaching is something we need more of, and I hope you’re doing well. If you ever consider coming back to make more content, I’d be thrilled. We need more people like you who have that deep desire to truly help others learn. Thank you again for your incredible work.. it’s made a lasting impact on me.
@@Yuzema thank you for your kind words! I'm glad this video was helpful.
Vielen Dank
This is more than enough for someone to understand
GOD BLESS YOU
As much as I shouldn't, I absolutely despise looking at the table for the value I need. I really appreciate the video! Thank you!
Thank you so much !!! You explained it so easily !!
Mines had e2 and I can’t seem to solve it
It's very helpful
What if the given is -2.4 greater than or equal to P less than or equal to 2.4
Because we know the normal distribution is symmetric, and 100% of area is under the curve, find the percent of area between 0 and 2.4 and then double it, since that same area is between 0 and -2.4. Hope that's helpful!
YESSSS!!!@!!!!!!!
i've no word thank you for helping me out may God bless u🙏
Super❤❤❤❤
Thank you for making this video!
بارك الله فيكم و جزاكم الله خيرا جزاء المحسنين
Thanks a looootttt! I was upset and even gpt-4 didn't think to that solution, you're the boss!
you have a calm voice that makes me feel relaxed when listening
Clearly explained 👏🏻👏🏻👌🏻👌🏻 Awesome Video
Thanks!
is the lower value always 0?
and I'm always getting 0 after pressing enter for the X= value at time 3:13
Hi, @morganmccall1499, when we put 0 in for the "lower", and X in for the "upper", we're trying to find a X2 value which has some area between 0 and our desired X2 value (that is why we subtract 0.025 from the equation, because this tells the calculator to find the X2 value which has 2.5% of area between 0 and that X2). To find the X2 value which has some area to the right of it, you would enter X as the lower, and E99 as the upper, and then subtract the area to the right of your desired X2 value. If you're always getting an incorrect result (as mentioned at time 3:13) you have one more step to go, which is pressing ALPHA and then ENTER. This is like the "start" button for the calculator to run the X2 cdf function. Using "X" instead of 0 for the lower value is explained starting at time 3:40.
Thank you :)
thank you ! It worked on my physical calculator ti-84 plus, so it doesn't just work for computer software
Your voice was very relaxing, 10/10 would recommend to a friend
beautifully done , I'm sure you can press Alpha twice to lock if you like instead.. thats where I often make a mistake because I'm thinking I'm unlocking on the second press and instead I locked it .
Thanks well done example well illistrated and love the voice calm and clear..
Well done very clear Thank you...
Thanks , I was going nuts trying to do this on My TI 89. THaNKS AGAIN...I learned a lot today now to apply it to real life...
Very good Thanks...
Do you know if the Casio fx-991EX have the T-distribution calculators? like Tcdf, inverseT? Been searching everywhere but no one seems to have the answer and im starting to think if it just doesn't have the function TT
I don't have this version, but on Casio's website, their manual is at www.casio.com/content/dam/casio/global/support/manuals/calculators/pdf/004-en/f/fx-570_991EX_EN.pdf, and it looks like they have only the normal cdf, binomial and Poisson. I'm not seeing the t distribution. However, you might read through more carefully than I did, and see if you find it. Sorry I couldn't be more help!
@@quantquill That actually helped aaaa lot!!! Can't believe you are still actively replying to a vid you made 4 years ago! Bless you, thank you, and take care!
@@melron1018 were you able to find it on the Casio fx-991EX? I have been looking for it too
@@dheepanshusukhija1 I was unable to find it, I just needed confirmation that there is no such function on the calculator, which was driving me insane. With that confirmed, I just used StatCrunch included with Pearson while I was taking my stats class.
@@melron1018 Having exactly the same problem! It's so infuriating honestly, about to just go into my final exam without it and its driving me nuts
Super helpful, thank you!
Thank you so much for this! Needed this function for a stats course!
Glad it helped!
dope as hell
thank you!!!!!!!!!!!!!
useless
Sorry you didn't find the video helpful. Do you have a question about weighted mean that wasn't answered here?
Terrific keep it up. Thank you very much indeed.
No idea if I'm going to use this as we haven't covered F distn's yet, but it was a fun exercise and maybe it'll save me a few minutes on the final.
You save me! Thanks!
Thank you so much!
Thank you!
great 👍💥
'I followed the steps and when I hit enter after putting the df I get "Err:Syntax 1: Quit 2:Goto
Hi Taguma, if you have a Ti 83 or TI 84 that looks like the calculator simulator, then we know the program works. So you should double check your code is set up correctly -- every space, comma and period matters. If you have any other calculator, like a TI 84 CE, then the code or the steps may be a little different. This program only applies to this specific calculator.
Thank you so much ❤😥
This helps me so much. Thank you!!
Thank you. It was really helpful. ❤
Shanika, I'm glad the video helped.
Great video ❤️
Thank you, Abass Kabbia. I'm glad it helped. 🤓
you're amazing thank you so much
Libuga nimo mo english oi 😭 di gyud ko kasabot bisag naa pay subtitle
I'm sorry that I'm unable to translate this to Cebuano. You could do a project in your class with your teacher to make a RUclips video for how to use the standard normal probability table.
THANK YOU SO MUCHH. now i understand how to use thiss :')
Such a life saveer!!!! Thank you!!!
You're welcome 🙂
Thank you so much😇🙏