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.
Depending on factors ranging from roof type to travel time, Worthâs Seamless Rain Gutters installs pad-style snow guards for about $8 to $13 per pad, fence-style for an average of $40 per foot, and S-5! ColorGard for $20 to $25 per foot.