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Expected Cell Counts
13.5 Finding Expected Cell Counts
The table below has data from a 2009 Canadian Journal of Human Sexuality study. The data shows gender differences in response to partner influence and social expectation questions among students who had ever had sexual intercourse. The sample for this study included only students who had ever had sexual intercourse (30.7% of the total sample) yielding 2145 respondents after corrections. The age range for the study sample was 13 to 21 years old (mean = 15.8, standard deviation = 1.19). The vast majority were 14 to 17 years old (93%) and 45% were 16 years old. Less than 2% were aged 13 or 19 to 21.
Did you use a condom the last time you had intercourse? Male Female Total
Yes 700 744 1444
No 244 457 701
Total 944 1201 2145
Find E21 (the expected value for the cell in the second row and first column)
Find E22