1. M

    Generating rates: individual level or aggregate??

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

    standardize by population density

    I have a variable called "number of events" for each state. It is a raw number of event that happened during a specific time frame. I was thinking I could use the population density or weighted population density to standardize the number of events across states. Is this correct? I would divide...
  3. K

    Rates of implementation

    Hello all, I've tried to find this elsewhere but can't seem to determine how to do it. I want to determine the implementing rate of GPS technology in vehicles. I know the number and percentage of new vehicles sold each year and the number and percentage of new vehicles sold each year with GPS...
  4. K

    lognormal process time, output rate distribution

    For a project of factory lay out we have given an assembly time of 20 min and stdev of 5 min. distribution type is not given but assumed lognormal (since normal is infeasable because of the possibility of negative assembly times). At what rate do the products exit the assembly station?for...
  5. S

    testing rates through time

    Hello all, this seems like it should be a simple questions but our team cannot find an answer to the question. If I have data set up like the following (the numbers are the percent that react positively to the drug): Drug 2007 2008 2009 2010 A 59 62 61 62 B 50 49 58 61...
  6. S

    Trend data with categorical independent variables

    I have 4 time points (future timepoints will be added shortly) measured for each company (about n=150). Each company is associated with one of 20 regions which is associated with one of six cities. At each time point, a % injured is calculated that was converted to a specific rate. I think...