Colin and Jezebel are employees at Game Zone. They recorded the number of computer games they sold each week for the past 9 weeks. Colin 15 20 21 9 3 16 9 14 17
Question
1 Answer

1. User Answers lucic
Answer:
Stepbystep explanation:
1. a) spread is the range which is given as Max(S) Min(S)
Colin =
[tex]3,9,9,14,15,16,17,20,21\\\\range=213=18\\\\[/tex]
Jezebel=
[tex]=4,5,8,10,11,14,20,20,26\\\\range=264=22[/tex]
Jezebel had a greatest spread.It was 22 while for Colin was 18
2. a) The middle 50% of the game sold is the difference between the third quartile and first quartile of the data
Colin=
[tex]=3,9,9,14,15,16,17,20,21\\\\median=15\\\\lower half=3,9,9,14\\\\\\Q1=(9+9) /2 =9\\\\\\Upper half= 16,17,20,12\\\\\\Q3=(17+20)/2 = 18.5\\[/tex]
⇒The middle 50% = Q3Q1 = 18.5 9 = 9.5
Jezebel
[tex]=4,5,8,10,11,14,20,20,26\\\\\\=lower half= 4,5,8,10\\\\\\upper half=14,20,20,26\\\\\\Q1=(5+8)/2 = 6.5\\\\Q3= (20+20)/2 = 20[/tex]
⇒The middle 50% = Q3Q1 = 206.5 = 13.5
Colin had the least spread of 9.5 as compared to Jezebel who had 13.5
c)The answers in part 2a and 2 b tels us that the middle section that contained 50% of the scores was more in Jezebel record than in Colin records.