Often the raw data itself is not normally distributed, but the logarithm of the data may in fact be a normally distributed set. To test if your numbers are log-normal, take the logarithm of each point, then apply one or all of the tests above.
Because labor costs vary across the country, the cost of adding Hardie board siding to a home depends on location. The Bureau of Labor Statistics show that as of May 2010, installers made a mean $21.10 per hour, with lows of $11.85 and highs of $34.45.
Cost to Install Cobblestone Pavers. Professional cobblestone paver installation costs between $11.65 and $18.04 per square foot on average. The actual price homeowners will pay will depend on factors, including the type of pavers used, the complexity of the job and the experience of the worker completing the job.