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In the article Marijuana Use in College (Youth and Society, 1979: 323-334), 445 college students were classified according to frequency of marijuana use (Never, Occasional, Regular). Below are the bar graph and frequency/relative frequency table of usage for these 445 students. Standard Level of Use トrequencies Level Never Occasiona 200 150 E 100 Regu 50 Count Prob 226 0.50787 109 0.24494 110 0.24719 445 1.00000 ular Total N Missing Never Occasional Regular 3 Levels What proportion of students report using marijuana at least occasionally? O0.75506 O 0.49213 O 0.75281How to answer it ?

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