calculating standard deviation of each row

I am trying to use rowSds() to calculate each rows standard deviation so that I can pick the rows that have high sds to graph. my data frame is called xx is like this: head(xx,1) Job variable 2012-02-23 2012-02-24 2012-02-25 2012-02-27 2012-02-28 2012-02-29 2012-03-01 2012-03-02 2012-03-03 2012-03-05 2012-03-06 2012-03-07 2012-03-08 2012...

Sixth form standard deviation question

When calculating the mean for results you have to round the mean either up or down depending upon the number of significant figures that you recorded your results in, right? So, for example, if you had results of 8, 8 and 9 and your mean was 8.3, you would round it down to 8 right? But then when you do standard deviation on the calculator...

calculating annualised returns + Standard deviation of returns

I am trying to calculate the annualized return and standard deviation of returns 200-2012. Would anybody know the correct equations to do this within excel. I have attached the spreadsheet Many Thanks Attached Files RETURNS WORK SHEET.xlsx‎ (10.9 KB)...

Undergraduate Standard deviation

I know this is really simple but I'm extremely confused on finding the standard deviation on different sets of data. I looked on a past paper (there are no solutions) and this was a question: The module marks of 99 students are shown in the table below: x-<30-<40-<60-<70-<100 f 9-4-35-21-30 Find the mean & standard deviation The mean isn'...

Standard deviation on calculator

Hey guys! I have been unsuccessfully trying to work out standard deviation on my calculator. Its a Casio fx-85GT plus. I would really appreciate it if someone could help me out. Thanks! :)...

Sixth form Confidence Intervals

Hi, I have been given some questions to complete on confidence intervals, but the style of the question just changed and has left me a little confused. 4. The average marathon time for members (sample of 25) of the Men's Nottingham runners club is 4 hours; the standard deviation is 30 minutes. What would the mean be at 1, 2 and 3 standard...

Sixth form 'A' level Stats 1

Hi. Could anybody help, please? Question: A machine which cuts dough for loaves can be adjusted to cut dough to any specified weight. For any set weight, 'mu' grams, the actual weights of cut dough are known to be approximately normally distributed with a mean of 'mu' grams and a fixed standard deviation of 'delta' grams. It is also known...

Sixth form Standard deviation overlap?

Hey I've got a biology EMPA in a few weeks and needed to know the significance (or implications) of the standard deviations of different sets of data overlapping? Thank you.:)...

Sixth Form Statistics Means and deviations

Data relating to the lifetimes (to the nearest hour) of a random sample of 200 light bulbs from the production line of a manufacturer were summarised in a group frequency table. The mid-point of each group in the table was represented by x and the corresponding frequency for that group by f. The data were then coded using and summarised a...

Devo 10 and WK 2801Pro Buddy Box?

I have a WK 2801Pro, great radio but I am stranded with it. I am thinking of getting a Devo 10 and flashing it to Deviation. Would I be able to buddy box them? I am going to ask on the Deviation forum, but HF is my 'home' so I thought I would ask here.

Devo 8s usb problem

Had install the Deviation 3.0 firmware to see if my little parkzone plane was working, everything is fine soo I decide to bring the original firmware back since the Deviation menu is a littlebit java style and I dont have much Blade soo I download it from walkera website and all is get back everything ok but now my USB device dont work p...

R find minimum deviation from vector from a matrix of possible vectors

I have the following data set.seed(11) Data<-rbind(c(1:5),c(2:6)) Candidates <- matrix(1:25 + rnorm(25), ncol=5, dimnames=list(NULL, paste0("x", 1:5))) colnames(Data)<-colnames(Candidates) I want to subtract each row of my Data from each row of the Candidate matrix And return the minimal absolute difference So for row one I want to find...

Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones

Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has maintained careful records regarding the time to prepare a return. The mean time to prepare a return is 90 minutes and the standard deviation of this distribution is 14 minutes. Suppose 100 returns from this year are selected and analyzed rega...

AQA GCSE Statistics Coursework

HEY!! Over the next 2 weeks I have to complete my statistics coursework but I'm not quite sure how to start it. My hypothesis is "the more populated an area is the higher the unemployment rate. Overall females have a higher unemployment rate than males". So does anyone know how I can start it? I am planning to do a scatter graph and Spear...

Does the C# method TimeZoneInfo.ConvertTime handle DST?

I have the following list of time zones that a user can choose from, Mountain Standard Time is in there twice for Arizona. These aren't want they see when they choose. I pulled this list of a website that had all of Microsofts time zones. I guess I'm confused if it had Mountain Standard Time listed for the regular states and AZ. Hawaii...

Secondary GCSE Statistics hypotheses

Hi! I'm beginning to plan my coursework for edexcel gcse statistics and the first step is coming up with two interrelated hypotheses! The topic I've chosen is food which is very wide so I've really no idea! Can you help me decide on my hypotheses? They need to allow me to complete higher-tier skills such as standard deviation, spearman's...

Dream in blue

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Java Sorting Data Structure

I am taking in a object with multiple data fields (3 string fields, two int fields) from a text file, calculating a certain numerical value, and then I need to place them in a data structure, one-by-one as I read them in from the file. By the end of parsing/calculating/storing, I need the structure to be sorted by that calculated value so...

Babies Are Evil, Just Like Us

Discovered: Babies are very calculating; political turmoil affects HIV treatment; another Earth is out there, probably; gender stereotypes affect the advancement of women in science. Babies like people who injure babies not like them . It's no secret that infants like people who are nice to them — usually their parents, and maybe their pl...

Undergraduate Need help on a Normal Distribution question

In a factory, cartons are filled with powder. The weight, in g, of the powder put into each carton has a normal distribution with mean 500 + c and standard deviation 5. The value of c can be chosen. The filled cartons are weighed and any carton found to contain less than 500g of powder is rejected. Any rejected carton has to be corrected.

ATR Indicator

The DIG Average True Range indicator is an improvement of the standard ATR – average true range indicator, which is a popular volatility indicator used by many traders. The standard ATR is an amazing indicator, but it has one major inherited flaw. When we use a volatility indicator such as the ATR, we want to know the real price action by...

Car Valet €19

Car Valet: Mini (€19), Standard (€29) or Standard With Autoglym HD Wax (€35) at ShineXpress (Up to 62% Off) Mini Valet Standard Valet Standard Valet with Autogylm High Definition Wax...

Calculating pdf of Dirichlet distribution in python

I'd like to calculate the pdf for the Dirichlet distribution in python, but haven't been able to find code to do so in any kind of standard library. scipy.stats includes a long list of distributions but doesn't seem to include the Dirichlet, and numpy.random.mtrand lets one sample from it, but doesn't give the pdf. Since the Dirichlet is...

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I am accepting orders for Takara Tomy Cars Tomica. The stocks will be available on June end. These are brand new cars in their original boxes. Each car is sold for P350. C-1 Lightning McQueen (Standard Type) P350 C-2 Lightning McQueen (Dinoco Type) P350 C-3 Lightning McQueen (Cruising Type) P350 C-4 Mater (Standard Type) P350 C-5 Sally Ca...

is there a way to get the standard back button within the navigation bar in this setting?

I have a tab bar based app. But from one screen the user may go to a more detailed view which does not have the tab bar. The detailed screen has a navigation bar at the top and a simple button on the right as part of the navigation bar which works. ( I have created the navigation bar and the right button within Bar Button Item in IB and a...

Sixth form AQA Statistics 1 Normal Distribution Help

A health food cooperative markets free-range eggs. Eggs weighing less than 48g are graded small, those weighing more than 59g are graded large and the rest are graded medium. The weight of an egg from a particular supplier is normally distributed with mean 52g and standard deviation 4g. Find: (a) The proportion of eggs graded small, (b) T...

Socket explanation in C and C++

Well I have been wondering if there is a standard socket header file for C++ I did search the whole internet (using google search engine ), but couldn't find any standard socket header file for C++ , beside finding some libraries, like Boost, chilkat etc... I have only succeeded in finding a standard socket header file for C programming l...

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Statistics question???

A High Street Bank is reviewing the operation of its cash machines. One of the problems the Bank faces is to ensure that the cash machines are stocked with enough cash to satisfy customers making withdrawals over an entire weekend. If too much cash is unnecessarily kept in the machines, the bank is forgoing the opportunity of investing th...

Undergraduate Statistics for Economics

I have completed the first 5 questions of the past paper I was set (and the end of the last question), I cannot however do any of question 6, 7 or the beginning of 8. My problem mainly lies with unbiased estimators. Help Please :confused: Question 6 A retailer has just received delivery of 150 newly manufactured Toshiba laptops. Each lapt...

Sixth form what sort of marks in solomon papers?

Hi, I'm preparing for c1 and s1 coming up, and i'm doing the solomon papers. I've already completed every standard edexcel paper and was getting marks around 70-73. I've found that my marks are lower in the solomon, ranging from 60-70. I've done about 5 for each and in each paper there's often questions, I've never seen in standard papers...

Squier Standard Jazz upgrade...

I am thinking about replacing the electronics(pickups and pots) on my squier standard jazz bass. I have a fender blacktop jazz bass that has a great sound, and play a deluxe active jazz bass that sounds even better. I like the feel of my standard jazz, but it lacks something in its tone. I know that the squier pickups are both the same si...

FFmpeg: calculating PTS of decoded video frames

Hi there, I'm making a basic video player in c++ using libffmpeg and SDL and I'm having some problems getting the correct Presentation Time Stamp (PTS) of each decoded frame in the stream. I've read through the entire tutorial here: http://dranger.com/ffmpeg/ and my code is fairly similar although more object orientated. I stream the pac...

Calculating UCAS Points

Can someone help me out here. When calculating my UCAS, if I take a subject at AS and then continue it to A2, do I add the points I got at AS (60) to my A2 points (120) to make 180. Or do we just keep 120 as I didn't drop it? I worked this out at 640 UCAS points but that seems incredibly high. I think I've done it wrong because I don't kn...

manipulate data to better fit a Gaussian Distribution

I have got a question concerning normal distribution (with mu = 0 and sigma = 1 Let say that I firstly call randn or normrnd this way x = normrnd(0,1,[4096,1]); % x = randn(4096,1) Now, to assess how good x values fit the normal distribution, I call [a,b] = normfit(x); and to have a graphical support histfit(x) Now come to the core of th...

What is the reference source for a standard XUnit report XML

I am writing an alternative to CUnit and i want it to generate XML output. I want the output to be compatible to jenkins / hudson - so i am looking for the standard xml form that all XUnit tests complie to. Is there such a standard? Where is the definition of requirements to be displayable by jenkins/hudson?...

DFC head with standard shaft?

Hey guys, I'm building an AH-1 scale body Trex500 and purchased a DFC head. I don't like how the DFC shaft is so much lower than the standard shaft as the real AH-1 actually has the head/shaft quite high up. It looks more realistic with a taller shaft. My question is, would it be ok to run the standard shaft with the DFC head? I'm guessin...

Calculating great circle distance in r programming with high data resolution

I'm new to R programming but I'm calculating the great circle distance flown by a long haul airliner and I've tried rdist.earth() from the Fields package, soDistsN1() from the sp package and other commands. Plus I've pretty much exhausted google in my search. It's easy to do this in Matlab but I can't seem to find a way in R. The problem...

[$97.99] Holden Standard Denim Skinny Pant Men`s by WhiskeyMilitia

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Bank Standard for Android

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