The Essentials of Biostatistics for Physicians, Nurses, and Clinicians

9.6 Exercises 155

Table 9.6
Season of Birth for 600 Schizophrenic
Patients over 6 Years

Season Number of patients

Year 1 Fall 20
Winter 35
Spring 20
Summer 25

Year 1 Total 100
Year 2 Fall 32
Winter 38
Spring 10
Summer 15
Year 2 Total 95
Year 3 Fall 27
Winter 43
Spring 13
Summer 17
Year 3 Total 105
Year 4 Fall 19
Winter 36
Spring 18
Summer 28
Year 4 Total 101
Year 5 Fall 33
Winter 36
Spring 14
Summer 21
Year 5 Total 104
Year 6 Fall 23
Winter 41
Spring 22
Summer 9
Year 6 Total 95