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# Forum: Applied Statistics

Statistics in finance, economics, engineering. Actuarial science. Econometrics. Operations research.

1. ### Setting Statistically Significant Improvement Goals

Hi: I work in clinical informatics for very large academic hospital. Currently we are attempting to set 2016 goals for our patient satisfaction...

• Replies: 2
• Views: 3,200
12-29-2015, 10:16 PM
2. ### Can we use bar chart to represent averages?

Hi to all, I would like to know if the heights of the bars of a bar chart can represent averages, or if they can just represent frequencies. I have...

• Replies: 2
• Views: 2,726
12-18-2015, 11:54 PM
3. ### Process hypothesis testing - difference between means with known method variance

Dear experts, I have a measurement method. To evaluate the method I have used it to take 24 parallell samples from a production process and repeated...

• Replies: 0
• Views: 1,186
12-09-2015, 07:34 AM
4. ### Is it possible to measure population targets using random sampling & likert surveys?

Hi! I am not an expert and I thought I would ask this question here and request some help - anything would help! I have a target to reach 100 ...

• Replies: 0
• Views: 996
12-08-2015, 10:40 AM
5. ### chi square test for various probability distribution

i want to find out the goodness of fit statistics and p value of various probability distribution by using chi square test. distributions are: 1....

• Replies: 0
• Views: 1,412
12-08-2015, 02:00 AM
6. ### Need Help with Correlation

Hi, I am trying to figure out the best way to calculate correlation with data I have for my business. Here is an example of what I the fields: ...

• Replies: 2
• Views: 1,663
12-05-2015, 04:05 PM
7. ### Creating an index - dependent variable, weighting, research question

Caveat: I'm basically teaching myself statistics to complete a dissertation so forgive ignorance and bumbling through this, I promise I'm googling...

• Replies: 0
• Views: 1,454
12-03-2015, 10:54 AM
8. ### Two many outliers for Tukey boxplot?

I calculated Tukey extreme outliers (in this case only for outliers at the top of the distribution). The calculation is upper quartile +(3*IQR). I...

• Replies: 16
• Views: 3,600
11-19-2015, 05:22 PM
9. ### Moment generating function

• Replies: 0
• Views: 1,069
11-17-2015, 02:33 PM
10. ### Comparing data sets with two very different samples sizes - stats newbie

Hi, I realize this question might have been asked before, or is very rudimentary, but I'm having trouble figuring it out. I have several data sets...

• Replies: 0
• Views: 1,146
11-17-2015, 01:26 PM
11. ### Which Test to Prove/Disprove hypothesis...

Hi, I'm new to this forum and I'm not entirely sure if this is the right subtopic to post my question on but I'm hoping someone can give me some...

• Replies: 2
• Views: 1,957
11-14-2015, 08:28 PM
12. ### Demographic data and MANOVA

I have a set of demographic data including countries categorised into 6 geographical regions and I want to see how these regions differ depending on...

• Replies: 0
• Views: 1,023
11-13-2015, 11:09 AM
13. ### How to calculate?

Hello, I would like to ask if anybody know how to calculate break even point of number of loans in peer to peer lending? How much (number of...

• Replies: 0
• Views: 1,407
11-11-2015, 07:06 AM
14. ### Proper statistical analysis for similarity of two paired datasets.

Hi! I am an engineering student and as part of an undergraduate research, I created a device that measures a certain value. However, there is a...

• Replies: 2
• Views: 1,441
11-10-2015, 07:52 AM
15. ### Evaluation of a Factor developing within a population over time

Hi, For an employee survey, we would like to have a monthly indicator on how several factors ( for example work related stress ) are developing. ...

• Replies: 0
• Views: 973
11-06-2015, 08:16 AM
16. ### vargha and Daleney A test ( to measure significance and direction)

Hello As part of survey data. i conducting Mann whitney U test on ordinal data to identify the difference in ranking of dependent variable by...

• Replies: 0
• Views: 858
11-06-2015, 03:27 AM
17. ### correct way to find error/uncertainty

I have a set of 10 values of a physical quantity P which is defined as P=\sqrt{q^2+u^2} where q and u are themselves two different physical...

• Replies: 0
• Views: 707
smp
11-02-2015, 04:53 AM
18. ### Comparing which work units are more successful than others

I have been given a project to determine which work units are more successful than others. My dependent variables are closing cases successfully, and...

• Replies: 5
• Views: 1,407
10-30-2015, 04:11 PM
19. ### Time series and forecasting

Which for me are the same thing. I have lots of questions, but at heart the most important. If you are running regression and both the DV and IV...

• Replies: 3
• Views: 1,674
10-27-2015, 10:45 AM
20. ### NFL Week 6 regression predictions

http://trevorbischoff.com/nfl-2015-week-6-predictions/ Atlanta 54% NY Jets 79% Pittsburgh 52% Minnesota 73% Buffalo 55% Detroit 84% Denver...

• Replies: 0
• Views: 1,154
10-13-2015, 07:28 AM
21. ### Variance of mean with correlation between auto-correlated time series

I have several time series of daily temperature measurements for the same period but different places. (More concrete, 9 places with data for 92 days...

• Replies: 1
• Views: 2,108
10-03-2015, 06:10 AM
22. ### statistics for number of cells per image

greetings, I am trying to compare number of cells per image frame in a treated group and an untreated group. I created photo montages based on...

• Replies: 1
• Views: 1,206
10-03-2015, 04:21 AM
23. ### missing data/multiple imputations

They often talk about whether the mechanism that generates missing data is"ignorable." I don't really know what this means in practice. Also how do...

• Replies: 114
• Views: 17,635
09-30-2015, 01:09 PM
24. ### Data Driven Logistic Regression

Hi everyone, I just wanted to share a real life usage of logistic regression that I like to monitor as data feeds into it. Plus he is comparing it...

• Replies: 4
• Views: 1,700
09-29-2015, 07:58 AM
25. ### MA() part of ARIMA: How do you get error terms?

I've been through the excellent forecasting book coauthored by Hyndman on otext.org. I'm having trouble understanding the actual algorithm. The MA(x)...

• Replies: 7
• Views: 3,294
09-25-2015, 01:31 PM
26. ### Which control chart to use

I am tracking spending by month going back about 5 years. It is obvious that the pattern changed dramatically in May 2015 and continued for at least...

• Replies: 4
• Views: 1,803
09-24-2015, 01:34 PM
27. ### help making sense of two-tailed test

Hello, there is no 'spatial statistic' section in this forum, but I do know that there are some 'spatial' guys around here, so I will post my...

• Replies: 2
• Views: 1,951
09-16-2015, 07:34 AM
28. ### Which type of time series to use?

Hey, I have a data set which includes weekly/monthly sales and questions about customer satisfaction. I have already done EFA/CFA based on these...

• Replies: 6
• Views: 2,499
09-14-2015, 04:33 PM
29. ### Calculating a heat retention index for thermos bottles

I have a couple of thermos bottles that I use for hot beverages at my desk. I like my drinks at about 135°-145°, so that's the range I am most...

• Replies: 5
• Views: 3,710
09-13-2015, 10:09 PM
30. ### conditional distribution functions.

Ppppppppppp

• Replies: 0
• Views: 2,502
09-13-2015, 12:58 AM
31. ### Multivariate normality and sample size

I see these type of comments a lot and I don't understand why they are correct (I know this has to do with tests that are asymptotically accurate).

• Replies: 7
• Views: 1,855
09-11-2015, 07:43 PM
32. ### Standardizing the SD of two price series with different mean

Hello, I have got two time series of stock prices. Usually the logarithmic returns (= first difference of logarithmic prices) are used to...

• Replies: 3
• Views: 3,511
09-05-2015, 12:53 PM
33. ### Egarch

the real life interpretation of constant (omega) parameters in EGARCH model.

• Replies: 0
• Views: 1,508
09-04-2015, 07:05 AM
34. ### Calculating Population-weighted Atkinson index in Excel

For my dissertation, I am calculating inequality on a worldwide level, between countries. In my calculations, I would like to give each country a...

• Replies: 2
• Views: 4,223
08-30-2015, 05:07 PM
35. ### Combining queues

So i am playing around with a serial queueing model. At the moment i have two independent M/M/1 queues, but with different parameters for the...

• Replies: 0
• Views: 933
08-27-2015, 04:03 AM
36. ### Cluster techniques for large datasets

Hi all. I am looking for a topic of my master's dissertation. I had an initial discussion with my supervisor and we decided to analyze different...

• Replies: 6
• Views: 1,145
08-26-2015, 01:04 PM
37. ### How to divide standard deviation

Hi, I am developing a model of vehicles traveling regular routes. Assume the length of the path (distance) from each stop to the next is known....

• Replies: 0
• Views: 1,639
08-23-2015, 10:56 AM
38. ### Determine sample size to get a statistically significant result

Hello, this question concerns the topic of A/B split-testing. More about it on wiki here. I need to determine what is sample size would I require...

• Replies: 1
• Views: 2,801
08-19-2015, 09:03 AM
39. ### [SOLVED] NPV calculation

I am not doing NPV in the normal sense. I have an existing cost. We generate a benefit that begins when the person leaves the system. We assume,...

• Replies: 0
• Views: 1,048
08-18-2015, 12:36 PM
40. ### Nonparametic equivalent for RM 2way?

Hi! I'm new here and at my company we do not have an easily accessible statistician so any help that you can provide would be greatly appreciated. ...

• Replies: 1
• Views: 1,028
08-18-2015, 02:09 AM
41. ### Aggregation of different variables

Hi there ! I'm currently doing a regression and some of my explanatory variables are socio economic ones (revenue, number of children per...

• Replies: 1
• Views: 1,207
08-17-2015, 07:33 AM
42. ### Does this use of graphs create wrong answers.

I am graphing 5 flows of spending over time (in excel, but I don't think that is pertinent to this issue). Because the axis ranges from 0 to 11...

• Replies: 8
• Views: 1,330
08-13-2015, 11:06 AM
43. ### Serial Queuing Model

Hi all, Does anyone know of any good resources for how to develop a queuing model which has serial servers? It would be a bonus if it uses R. ...

• Replies: 3
• Views: 1,779
08-13-2015, 03:27 AM
44. ### Applying Statistics to Random Drug Screening

Hi everyone. I'm new to the forum and I joined because I was hoping someone could assist me with a problem that I'm trying to solve at work. I've got...

• Replies: 5
• Views: 1,788
08-12-2015, 08:51 PM
45. ### Application of Empirical Bayes Method in Supply Risk

Hello everyone, I am interested in creating a tool in Excel which would find estimates of the rate of occurrences of non conforming items received...

• Replies: 0
• Views: 1,310
08-12-2015, 03:54 PM
46. ### Specifying interaction terms

I rarely if ever have any substantive theory to base my models on. That said, say you have five variables you think might impact some DV. Not knowing...

• Replies: 8
• Views: 1,885
08-11-2015, 03:54 PM
47. ### Betting Statistics - Calculation of odds accuracy - what am I measuring here?

Hello folks! Before anything, an important disclaimer: I am an amateur at statistics and I’m trying to learn by my own. Please bear with me if the...

• Replies: 2
• Views: 1,982
08-10-2015, 02:17 PM
48. ### multi variant analysis for the weighted effects on migration

Hello, I have two questions: that are connected but not exactly the same. now, I'm not a statistician but more of a historian, so be gentle :) I...

• Replies: 0
• Views: 1,616
08-10-2015, 12:12 PM
49. ### Help Required - Using Correlation Factor to Estimate Missing Data

Dear Gents/Ladies, I need help please, I have to sets of data, which are actually readings of temperatures in two different spots versus time,...

• Replies: 3
• Views: 1,293
08-05-2015, 02:40 PM

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