7 is actually negatively skewed (C),
and 19 was C not D
The median is closer to the bottom of the scale, showing that most of the data is present in that area. As we know, data bulking around the bottom of the scale is referred to as positively skewed, while negatively skewed is data that is highly present in the higher end of the scale.
I'll show the working out for 19:
he gets paid 22.35/h for a 40 hour week.
= 22.35 * 40
= 894
his allowance for callouts is 150 for that week
= 894 + 150
= 1044
He is called out twice for emergencies (and every time he is called out he is payed a minimum of 4 hrs double time)
= 2 * (4 * 2 * 22.35)
= 357.6
= 1044 + 357.6
= 1401.60
On one of these times he is out on emergency call for 5 hours.. so he gets paid an extra hour for this work (at double time)
= 1 * 2 * 22.35
= 44.7
Total pay = 1401.60 + 44.70
Total pay = $1446.30
Therefore, the answer is (D)
I posted a new thread in this section with the answers to Section II of the paper. I wrote down my answers and got my teacher to mark them when I came out. I lost about 5 marks in the paper (0 lost in multiple choice) and so I've put those ones in the answers from memory. Good luck with the rest of your exams!