2) The local manager of Food Queen is interested in the number of times a custom
ID: 3438585 • Letter: 2
Question
2) The local manager of Food Queen is interested in the number of times a customer shops at her store during a two-week period. The responses of 51 customers were: (Complete the distribution)
5 3 3 1 4 4 5 6 4 2 6 6 6 7 1
1 14 1 2 4 4 4 5 6 3 5 3 4 5 6
8 4 7 6 5 9 11 3 12 4 7 6 5 14 1
1 10 8 9 2 12
Classes
F
RF
CRF
0 - 2
3 – 5
6 – 8
9 – 11
12 - 14
Data: Frequency Distributions and Graphic Presentation
(a) Where do the data tend to cluster?
Classes
F
RF
CRF
0 - 2
3 – 5
6 – 8
9 – 11
12 - 14
Explanation / Answer
Reordering them from lowest to highest for easier inspection,
1
1
1
1
1
2
2
2
3
3
3
3
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
7
7
7
8
8
9
9
10
11
12
12
14
14
31
Thus, filling in the frequency column:
F:
9
21
13
4
4
*************************
Filling the RF column by dividing each entry by 51,
RF:
0.176470588
0.411764706
0.254901961
0.078431373
0.078431373
***********************************
Filling the CRF column by adding all RF up to that row:
CRF:
0.176470588
0.588235294
0.843137255
0.921568627
1
****************************************
A)
As we can see, the group with highest frequency is the 3-5 group. Data tends to cluster there. [ANSWER]
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