Question

Second, the researcher wishes to use graphical descriptive methods to present summaries of the data on each of the two variables: hours worked per week and income earned per year, as stored in HOURSWORKED63 worksheet.

(a) The number of observations (n) is 63 individuals. The researcher suggests using 7 class intervals to construct a histogram for each variable. Explain how the researcher would have decided on the number of class intervals (K) as 7.

Data of HOURSWORKED63 Excel spraedsheet is below:

Yearly Income ('000's)	Hours Per Week
43.8	18
44.5	13
44.8	18
46.0	25.5
41.4	11.6
43.3	18
43.6	16
46.2	27
46.8	27.5
48.2	30.5
49.3	24.5
53.8	32.5
53.9	25
54.2	23.5
50.5	30.5
51.2	27.5
51.5	28
52.6	26
52.8	25.5
52.9	26.5
49.5	33
49.8	15
50.3	27.5
54.3	36
55.1	27
55.3	34.5
61.7	39
62.3	37
63.4	31.5
63.7	37
55.5	24.5
55.6	28
55.7	19
58.2	38.5
58.3	37.5
58.4	18.5
59.2	32
59.3	35
59.4	36
60.5	39
56.7	24.5
57.8	26
63.8	38
64.2	44.2
55.8	34.5
56.2	34.5
64.3	40
64.5	41.5
64.7	34.5
66.1	42.3
72.3	34.5
73.2	28
74.2	38
68.5	31.5
69.7	36
71.2	37.5
66.3	22
66.5	33.5
66.7	37
74.6	43.5
62.0	20
57.3	35
55.3	24

Answer 1