Question 982900
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x=score of the seventh student 
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i) If the mean is equal to the median?
median=5
mean=(4+4+5+5+5+6+x)/7=5
29+x=35
x=6 
ANSWER: If the median=the mean, the 7th student scored 6.
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ii)If the mean is greater than 6.
mean=4+4+5+5+5+6+x/7>6
29+x>42
x>13 
ANSWER: To increase the mean above 6, the 7th student must score higher than 13.