Search results

Hello guys, I wish to model the number of days patients stayed in a clinic. Some of my predictors included: type of injury/disease, age, insurance, etc. Since days are count data and my data is over-dispersed, negative binomial models seem to be the appropriate technique. However, I know that...

Hello, I have two main questions that I hope you help me answer. Let me give you the scenario first. Let’s say that some students in a school are assigned to 3 different programs after being involved in a fight. The aim of the program is to prevent students from fighting with each other. My...

Using approach 1; the average number of infraction per 100 days is 0.7 and option 2 ((7/175)*100)=0.9

Hello, My dependent variable is counts of fights in schools. My independent variable is the schools’ proportion of students with a single parent. I hypothesized that schools with higher proportion of students with only one parent will have more fights. I used a negative binomial regression...

Hi guys, I have a string variable that looks something like this: MMDC-6MA. I need to extract the first letters before the sign "-", So I need GMDC. Any ideas? Thank you, Marvin

Hi all, I have a questions regarding statistical power and sample size. (1) Do I have to worry about sample size in a multiple logistic regression if I am using all the individuals in a population (census) and not a sample? Let’s say that I want to see how many tourists in a resort report a...

I created the difference between pre and post UOF counts and then generate a variable that represents the median for each group. base on my calculations the median difference in pre is 2 UOF and post 2. Thank you, Marvin

Hello friends, My main task is to "test" if staff member who participated in the counseling sessions had fewer "Use of Force (UOF)" incidents in the 6 moths after the counseling session. I have a data set with the number of UOF incidents for the staff member in the 6 months before (pre) and...

Hello guys, I really hope you can help me with this. Any ideas/suggestions are welcome. My main goal is to create a model that predicts which staff member is more likely to use force (UOF) in a mental health center. The goal is to detect these officer and prevent them from using force. To...

Hello guys, What is the different between the "saving" options at the end of the command and the new command save graph filename? I have a do file with a serious of command including charts. When I use the command below and run the file multiple times I got the following error message...

Hello everyone, I want to start by saying that I don't have too much experience working with continuous dependent variables. I have worked more with Logistic regressions. I want to test if the numbers of Use of Force (UOF) a staff member of a mental clinic had in year 2014 predicts the...

I have a ID# for all my teachers but I noticed that there are some instances that an 2 or more teachers can have the same ID#. I want to create another unique ID# for teachers using my old ID # plus the month and date of their birthday. I have a day of birth variables which is storage as date...

I have a string variable containing dates (1/28/15) (DAateToday) and would like to make it a real date variable. I tried: gen RealDate=date(DateToday, "MDY") But it didnt work. After I have my date variabel I would like to create a variable that only includes the month and year...

Remove the hour of a date variable I have a date variable that looks like this: 01apr2014 17:06:55 The storage type for this variable is double and display format %tc I just need the date, that is 01apr2014. How can I delete the time. Thank you, Marvin

I am writing a report and need to write a very brief method section. I basically describe my sample (frequencies), some cross tabulations, and see the efffect of our program betwee pre and follow uo examinations. I used mc nemar test, pair sample ttest to see if there was an increase in...

Hello guys, I am running a stata do file that was working perfectly in the past and now it freezes and does not work properly. It freezes in the part that I run a logistic regression. Perhaps this is do because my dataset is bigger now- 45,000 obs. It thinks for hours and says "log on...

How can I count the number os Grantees that have used the ipad to collect participants information. In this case, 2 grantees CA0083 and CA0214 used the ipad. My variables are agency, datamode (excel, ipad and scan). This is a clinet level dataset. DataMode Agency EXCEL IPAD SCAN Total...

Hello friends, I have a dataset where each services offer by providers is in one row. However my goal is that each provider represents one row. I would like to create a variable that represents the LEAD grantee of my provider. Note that providers can have more than one grantee. For...

Hello, Below is how my dataset looks like: GranteeID ProviderID 11 11 12 11 26 27 78 27 78 27 33 33 33 33 33 33 I am trying to count the number of unique GranteeIDs by ProviderID. This is my attempt: egen grantee_count = count(GranteeID), by(ProviderID). However, grantee_count is not...

Hello guys, These are my variables: GranteeID Funding= Funding type there are 4 funding types (a,b,c,d) ProviderID=provider of the services Services= type of services (there can be 5 different type of services). In this dataset the services is the unit of analysis. Basically, I want...