Quote:
Originally Posted by Evenstar
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To do statistical analysis, you need to know what percentage of a target area was part of a study. The report gives no percentages at all. It never gives what percentage of the lake was included in the study, or even what percentage of the total boating hours were included in the recording of boat speeds. Here’s a more accurate analysis:
Based on a 10-hour boating day, the 11 weeks in this study add up to 770 hours (10 hours x 11 weeks x 7 days/week), yet speeds were only recording over 135 hours. And that’s a total of 135 – for all the sample areas combined. If all 9 sample areas were covered equally, speeds were recorded in each area for a total of only 15 hours over the entire summer – which is less than 2% of the daytime boating hours for this 11 week period. 98% of the time, at each of the study sites, speeds of boats were not being recorded at all...
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If this is how they teach probablity and statistics in your school you should ask for a refund.