1 Requirements for a Web-based Statistical Calculator Presented by Doug Hillmer Independent Consultant.

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1 Requirements for a Web-based Statistical Calculator Presented by Doug Hillmer Independent Consultant

A typical problem for data users Assignment: Get the most recent estimate of mean family income for families with children for Cecil County, Maryland. Compare this to the mean family income for families with children for the state of Maryland. Need this asap! User decides that she must hand over the estimates she derives along with the standard errors for these estimates

After some digging… ACS data from the year data release contains the most recent data for this assignment. But, there are some problems and limitations: If the aggregated data products are used, we can only create this mean income for families with “own children” We can’t use the PUMS data because Cecil County does not coincide with PUMA boundaries. After discussing issues with client, they decide to use aggregated ACS data products for families with own children.

As we will see, the assignment has several parts 1.Calculate the numerator for the mean 2.Calculate the denominator for the mean 3.Calculate the ratio (the mean itself) 4.Must do the above for Cecil County and the state of Maryland 5.Do a statistical comparison between the two mean incomes

The user is presented with a table shell for the numerator data source, B19128 and checks the 3 cells needed to create the numerator

Then the user is prompted to select the cell(s) needed from the denominator data source, B The user checks the 3 cells needed to create the denominator.

Next Steps for developing requirements for an SC Tool – Want to include other reviewers – Plan to do a webinar on the SC Tool idea later this Fall – Planning to hold a session on the SC Tool Requirements at upcoming SDC/CIC conf. at Census Bureau How to contact us and get a copy of the requirements if you want to participate in developing these requirements: Send to Doug Hillmer. Jane Traynham, Maryland State Data Center, 11 What is a “Statistical Calculator”?