SOLUTION: Seven students did a difficult test and six of their results are 4, 4, 5, 5, 5, 6. Workout the score of the seventh student ; i) If the mean is equal to the median? ii)If the

Question 982900: Seven students did a difficult test and six of their results are 4, 4, 5, 5, 5, 6.
Workout the score of the seventh student ;
i) If the mean is equal to the median?
ii)If the mean is greater than 6.
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
.
x=score of the seventh student
.
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.
.
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.
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