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.
Unlike vinyl, aluminum, or wood, Hardie board is a durable siding material consisting of sand, plant fibers, and cement. When mixed and formed into lap siding, fiber cement siding is nearly impenetrable to weathering and pests. To benefit from this high-quality siding, itâs important to weigh the initial cost with the extended value over time.