Mr Mukonda’s perfomance of his 170 Biostatistics class of students is given in an incomplete distribution below.
Variable 0-10 10-20 20-30 30-40 40-50 50-60 60-70
Frequence 12 21 f1 40 f2 26 18
(a) If the median is 35. Find the missing frequences [10]
(b) From Rusangu passing mark policy(40%), explain if these results are normally distributed
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