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.
These square tiles cost around $30 to $50 per square foot--less than the cost of a solid granite slab--but generally you must install them yourself. Having a laminate countertop professionally installed will cost anywhere between $25 and $50 per square foot, depending on the quality and features of the laminate.aving a granite countertop professionally installed will cost between $50 and $100 per square foot, depending on the features and complexity of the installation project, according to Countertops Key.