Pollution Climate Change Holocene Deforestation Population Acidification Y Not Freakin' Recyclable
Global Warming? During the late 1800 s, Lake Wingra in Madison, Wisconsin, was frozen over an average of 124.9 days per year. A random sample of eight recent years provided the following data on numbers of days that the lake was frozen over. [ 103 amp; 80 amp; 79 amp; 135 amp; 134 amp; 77 amp; 80 amp; 111; ] At the 5 % significance level, do the data provide sufficient evidence to conclude that the average number of ice days is less now than in the late 1800 s?
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