The ages in days at time of death for samples of 11 girls, Ask an Expert

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The ages (in days) at time of death for samples of 11 girls and 16 boys who died of sudden infant death syndrome are shown in Table E2.17. Calculate the mean x, variance s2, and standard deviation s for each group.

TABLE E2.17

Females	Males
53	46 115
56	52 133
60	58 134
60	59 175
78	77 175
87	78
102	80
117	81
134	84
160	103
277	114

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Statistics and Probability, Statistics

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