Question

The life span (days) of three genotypes of fruit flies was measured for both males and

females. Some calculations are presented below to test for significant differences in
life span among the genotypes (factor A), between the sexes (factor B), and test for a
genotype-sex interaction. There were 4 genotypes, and 2 sexes considered here. Each
treatment group had 5 observations. Use a 5% level of significance for each test to
answer the question below. Hint* calculate the Degrees of Freedom first using the
information provided in this text.
Two-Factor ANOVA
Source
Genotype
Sex
Interaction
Error
Total
SS
878.10
113.30
670.20
1000.20
2661.80
DF
MS
F
What is your conclusion regarding the effects of the sexes on the life span of fruit
flies?
Hint this question is asking you to choose a conclusion for a single factor only. You do not have to fill out the
entire table.

Answer 1

Based on the information provided, the effect of sexes on the life span of fruit flies can be determined by analyzing the Sex factor in the Two-Factor ANOVA table. To draw a conclusion for this factor, we need to calculate the F-statistic and compare it to the critical value at a 5% level of significance. However, the F-value for the Sex factor is not provided in the table.

To reach a conclusion, we would need additional information such as the F-value for the Sex factor. Without that information, it is not possible to determine the effect of sexes on the life span of fruit flies.



Hope this helps!