mean=jumlah data/banyak data
=78+53+60+65+80+78+60+50+77+53+55+80+85+85+85+70+70+65+53+78
=1380/20=69
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mean=jumlah data/banyak data
=78+53+60+65+80+78+60+50+77+53+55+80+85+85+85+70+70+65+53+78
=1380/20=69
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