## On determining the rise, size, and duration classes of a sunspot cycleNational Aeronautics and Space Administration, Marshall Space Flight Center, 1996 - Solar cycle - 20 pages |

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5-percent level amplitude cycles amplitude Rm occurrence ASC-PER ASC-SCN ascent duration ASC behavior of cycle chi-square statistic chi-square test statistic Comparison of smoothed cycle 22 turns cycle numberedness cycles fit David H denoted R(t Determining the Rise Duration Classes early behavior fast or slow fast riser Fisher's exact test function of elapsed Geophys Hathaway hypothesis testing independence between ASC involving two variables large amplitude large-amplitude cycle level of significance long period long-period cycle marginally significant Marshall Space Flight maximum amplitude RM mean curve cycles median value mutual independence involving NASA null hypothesis onset for cycle original distribution percent period classes ratio Reichmann related to ascent RM and ASC SECURITY CLASSIFICATION Short Long short-period cycle shorter than average shown in figure slow riser small amplitude small-amplitude cycles smoothed sunspot number Space Flight Center standard deviation units statistical significance Testing for mutual tion values for cycle variation of maximum Waldmeier effect Wilson