Question

Assignment 1-2019

1.  

X: 23   22        44        12        25        24        16        50        42        21        21        36        23        22        41

Y: 50   50        50        50        50        49        43        44        48        47        46        8          3          4          2

P: 5      3          5          7          12        5          43        15        17        11        48        50        41        12        50

a) Make a frequency distributions for data set x  and i=1

b)  Combine set x, y and p and make a grouped frequency distribution (use i = 4, first bin 2-5).  

c)  Using the same data and distribution add a column that shows the proportion frequency and the relative frequency (%)

d) add a further column that shows the cumulative frequency.

2. Use the following grouped frequency distribution to answer the following questions.

Score        f

30-32 2

27-29 3

24-26 2

21-23 3

18-20 1

15-17 2

a. Use the distribution to determine the score associated with C50, C75, C25

Answer 1

a)class interval frequency

11-20 2

21-30 8

31-40 1

41-50 4

b) class interval frequency proportion freq relative freq cumulative freq

2-5 8 8/46 17.39% 8

6-9 3 3/46 6.52% 11

10-13 4 4/46 8.70% 15

14-17 3 3/46 6.52% 18

18-21 2 2/46 4.35% 20

22-25 6 6/46 13.04% 26

26-29 0 0/46 0% 26

30-33 0 0/46 0% 26

34-37 1 1/46 2.17% 27

38-41 2 2/46 4.35% 29

42- 45 5 5/46 10.87% 34

46-49 4 4/46 8.70% 38

50- 53 8 8/46 17.39% 46