tag:stat-509-q-and-a.291.s1.nabble.com,2006:forum-1Nabble - STAT 509: Q and A2023-02-02T19:43:57Ztag:stat-509-q-and-a.291.s1.nabble.com,2006:post-1265/01/18 Class2018-04-30T07:48:05Z2018-04-30T07:48:05ZScottishCyclopsWithASword
Is there a class tomorrow?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-114HW 7.72018-04-24T14:40:25Z2018-04-24T14:40:25ZScott
How do we use the predict command?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-116HW_VII: Problem #1 part #62018-04-24T20:56:09Z2018-04-24T20:56:09ZAnas
Does anyone know the way we should answer this question?
<br/><br/>
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-112HW7P22018-04-23T15:09:07Z2018-04-23T15:09:07ZCole
How do we explicitly use sums to find beta1 in problem 2?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-111Multiple Scatter Plots for HW VII / #1.2018-04-23T10:02:26Z2018-04-23T10:02:26ZTaeho Kim
If you want to stack the scatter plots, then use the following command:
<br/><b>par(mfrow=c(2,2))</b><br/>before you run the codes for the plots
<br/>It will provide you the 2 by 2 output.
<br/><br/>If you want to escape from this output setting, then
<br/>simply tap the "broom" icon on the plot panel of R-Studio.
<br/>If will remove the plots and revert to the initial setting.
<br/><br/><br/>
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-109Homework VI Problem 12018-04-17T16:34:22Z2018-04-17T16:34:22ZAbby
When we are finding the test statistic, we need to find Sp^2. I understand this is found with the equation ((n1-1)*S1^2 + (n2-1)*S2^2)/(n1+n2-2). But, how do we find S1^2 and S2^2? Is it found using the equation for S from a single variable case and squaring it and doing this for both cases?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-108Q&A regarding HW V through emails.2018-04-02T10:23:01Z2018-04-02T13:25:19ZTaeho Kim
These were Q&A's through emails:
<br/><br/><b>Q: I am having trouble remembering how to calculate the quantile for a t type confidence interval.</b><br/><br/>A: t-quantile has two indices: confidence level and degrees of freedom.
<br/>The first one is either 90%, 95% and 99% and the second one is just the sample size minus one, (n-1).
<br/>Once you figure out the indices, then you can use <a href="https://drive.google.com/file/d/1qO2KyzkbdvBnHZSkcWTeEoydi-eQ3Clk/view" target="_top" rel="nofollow" link="external">this t-table</a>.
<br/>(This is the table I distributed in the class and you can find it on the course web-page as well.)
<br/>Anyway, the left hand side margin is about the degrees of freedom (df)
<br/>and the lower margin is about the confidence level.
<br/>By crossing out these two, the quantile can be obtained.
<br/><br/><b>Q: I was wondering if you could clarify what you would like for #3 part 1. Are we supposed to use R Studio? Do you want a plot in our answer? I am also having trouble getting the data into R Studio. </b><br/><br/>A: You can check qq-plot from the RStudio.
<br/>Don't waste your time on typing the data by hands.
<br/>Just copy and paste into RStudio as follows:
<br/>mydata<-c("the actual data")
<br/>(I showed you this in the class on Thursday.)
<br/>Then, use
<br/>qqnorm(mydata);qqline(mydata)
<br/>Those commands would give you the qq-plot for the answer.
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-106Small tips for HW42018-03-23T08:30:34Z2018-03-23T10:29:36ZTaeho Kim
For #2 part (1) and (2),
<br/>note the seven random variables are in fact a random sample.
<br/>This means every random variable has the same mean, mu, and variance, sigma^2.
<br/>With this information, you can check unbiasedness in (1) and calculate variance in (2).
<br/><br/><br/><br/>Any further questions are welcome!
<br/>
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-104Test Corrections2018-03-01T14:12:11Z2018-03-01T14:12:11ZRegina Phalange
For the test corrections, are we supposed to redo the entire question even if we got partial credit for it, or should we only answer the parts of the questions that we did incorrectly the first time and missed points on?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-99Topics covered on midterm2018-02-25T09:11:18Z2018-02-25T09:11:18ZSamyu
Will Weibull distributions be on the midterm? The notice says that the exam will cover chapters 1-4, which Weibull distributions are not a part of, but the formula sheet and Homework 3 have sections dedicated to the Weibull distribution.
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-101HW3: Problem #62018-02-25T12:38:52Z2018-02-25T12:38:52ZAnas
In problem #6 parts 2 and 4, what does the word (interpretation) mean?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-97HW 3 Question 42018-02-24T21:07:54Z2018-02-24T21:07:54ZScott
What do we assume to be the unit of days? Would it be the mean or do we even need it to solve the problem?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-95Rlab3 Problem22018-02-18T19:50:06Z2018-02-18T19:50:06Zbrice
So it asks in particular about C and D, but I think that A and B also have a step-wise pattern. I'm not sure what exactly I'm looking for and what that means as for the data of those Q-Q plots that are asked about. Could someone point me in the right direction?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-93R lab 32018-02-17T09:46:55Z2018-02-17T09:46:55ZAbby
when doing the example, I copied and pasted qqnormsim(fdims$hgt) into rstudio, but I get an error saying the margin is too large ("Error in plot.new() : figure margins too large"). Does anyone know how to fix this? Thanks!
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-91Homework #2 Problem #22018-02-12T18:56:58Z2018-02-12T18:56:58ZRegina Phalange
I am stuck trying to solve problem #2. I keep getting a quadratic equation that can't be solved. Can somebody please explain how to solve it?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-79HW2: Problem #1 part #42018-02-10T20:01:56Z2018-02-10T20:01:56ZAnas
Does anyone know what exactly should do in part 4 of problem #1 from homework 2?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-88Values of sim_streak2018-02-11T18:42:56Z2018-02-11T18:42:56Zbrice
Are the values being asked for what Rstudio shows when you do "> sim_basket" and just list the "H" and "M" outcomes of the simulation?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-80RLab2 sim_streak bar plot2018-02-11T09:58:31Z2018-02-11T09:58:31Zbrice
When i populate my bar plot, the x-axis is not labeled and i'm not sure what i am looking at since its set up different then the kobe bar plot. Can someone help me figure out how i can get these frequency tables' data.
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-76Student Question Today2018-02-08T08:17:43Z2018-02-08T08:17:43ZLogan Mancuso
In class today a student had a question in regards to the negative binomial distribution, in particular about
<br/>(y-1) choose (r-1). She asked how to calculate this by hand. This is a combination and follows the same formula, n!/r!*(n-r)! This is because the distribution does not care where the success and failures fall in the sequence of y-1 and thus calculates the number of different COMBINATIONS for the string. To answer the question it will be (y-1)!/(r-1)!*(y-r)! *NOTE&* the y-1-(r-1)! = y-r!
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-77Group Me for 5092018-02-08T08:22:51Z2018-02-08T08:22:51ZLogan Mancuso
<a href="https://app.groupme.com/join_group/38270927/fNbghY" target="_top" rel="nofollow" link="external">https://app.groupme.com/join_group/38270927/fNbghY</a>
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-72Study Group for our class2018-02-03T09:17:48Z2018-02-03T09:17:48Zsriskang
Is anyone create a study group for our class? If so, let me know the time please. Otherwise, I would like to create and meet on Fridays and some other times. Let me know anyone interested to meet on 2nd floor study room.
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-34Missing windows2018-01-22T11:31:17Z2018-01-22T11:31:17Zajm6
I downloaded R but when I open it I'm missing the two windows to the right, any clue why that is?
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-69STAT2018-01-28T21:16:21Z2018-01-28T21:16:21ZDT
Hello
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-63My 2 cents about Lab1: Q52018-01-26T11:59:36Z2018-01-26T11:59:36ZDarth Knight
Because of the outliers, the boxplots are squeezed
<br/>and become incomparable each other.
<br/>This can be resolved by adding "outline=FALSE" argument into "boxplot" command.
<br/>It will remove the outliers so that you can easily compare the two boxplots.
<br/>Let me know if this works okay. <img class='smiley' src='/images/smiley/anim_working.gif' /><br/>
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-66Lab 02018-01-28T15:44:30Z2018-01-28T15:44:30Zsalexeev
Sergei Alexeev
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-62Lab 02018-01-23T06:00:04Z2018-01-23T06:00:04ZRonnie Wess
Hello
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-61Lab 02018-01-23T01:42:43Z2018-01-23T01:42:43Zpmpatel
#5
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-60Lab 02018-01-22T23:58:23Z2018-01-22T23:58:23ZScottishCyclopsWithASword
Somebody once told me
<br/>"Hands off my macaroni"
<br/>Milwaukee Pasta Bandit found dead
<br/><br/>"He was picking up the gun,
<br/>with his finger and his thumb
<br/>raising up, pointed straight at his forehead"
<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>My name is Parker Gustafson.
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-59Just Saying Hey2018-01-22T22:35:34Z2018-01-22T22:35:34ZHoppy
Hey, I'm Matthew Hopkins but I go by Hoppy.
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-58Lab 02018-01-22T22:06:12Z2018-01-22T22:06:12ZMimsy
I am going to hire the Vikings to be my pallbearers at my funeral so when I die they can let me down one last time.
<br/><br/>SKOL
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-57Lab 02018-01-22T21:44:39Z2018-01-22T21:44:39ZJinny
Hello world
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-56Hello World2018-01-22T21:20:46Z2018-01-22T21:20:46ZJustin9877tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-55Lab02018-01-22T20:53:14Z2018-01-22T20:53:14ZKyle Render
What is up my peeps
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-54lab 02018-01-22T20:14:07Z2018-01-22T20:14:07ZMatt Tayloe
Hello.
tag:stat-509-q-and-a.291.s1.nabble.com,2006:post-53Lab 02018-01-22T20:13:28Z2018-01-22T20:13:28ZAustinR
Hey everyone