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StatisticsQ&A LibraryIn each of Exercises, use the Wilcoxon signed-rank test to perform the required hypothesis test. Global Warming? During the late 1800s, 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 80 79 135 134 77 80 111 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 1800s?Start your trial now! First week only $4.99!*arrow_forward*

Question

In each of Exercises, use the Wilcoxon signed-rank test to perform the required hypothesis test.

**Global Warming?** During the late 1800s, 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 | 80 | 79 | 135 | 134 | 77 | 80 | 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 1800s?

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