un agws e in Drosophila melanogaster (from Wikipedia: Drosophila melae Dihesed m
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un agws e in Drosophila melanogaster (from Wikipedia: Drosophila melae Dihesed melanogaster (froms the Greek for black-bellied dew-lover) is a two-winged insect that belongs to the the ost co volution) (eaviroamental sciences) 165 total points) Solail and Rolalf (195) repok or unpublished results by Sokal on the relationship between genetic background (as affected lby rter (from the d of the lies. The species is commonly known as the fruit fly, and is model organisms in biology, including studies in genetics, n25 females were chosen representatively from physiology and life-history ench of I - 3 lines of Drosophi that were bred to be resistant (RS) and susceptible ( Dichloro-Dipheny)-Trichloroethane, (SS) to DDT (from Vikipedia: "DDT, or eveloped early in World War it, and was initially used with great effect diseases aumong is the first modern pesticide and is arguably the best known to combat mosquitoes spreading malaria, typhus, both military and civilian populations, and as an agricultural biologist Rachel Carson published the l and harmed bird reproduction and other insect-borne human In 1962, American used cancer insecticide, ook Silent Spring, which alleged that DDT ca by thinning egg shells. This followed the principles of biological g higher level organisms like the birds. The book resulted in a large public vetaly led to the insecticide being banned for agricultural use in the USA, and was DDT was subsequently outcry which one of the signature events in the birth of the environmental movement. banned for agricultural use worldwide, but its use in disease vector cont n sotme parts of the world"), and a non-selected (NS) coutrol strain and per diem fecundity the mean number of eggs laid per female per day for the first 14 days of life) was measured for all n-?.1M = 75 fernale, with the following results Resistant (RS) Susceptible (SS) Nonselected (NS) 128 224 38.4 23.1 35.4 22.6 21.6 27.5 32.9 29.4 27.4 40.4 14.8 20.3 48.5 16.0 19.3 34.4 23.1 38.7 20.9 20.1 41.8 30.4 34.6 26.4 11.6 23.3 20.3 14.9 19.7 23.7 22.3 22.9 37.6 51.8 22.6 26.1 30.2 22.5 36.9 33.8 29.6 29.5 33.4 15.1 37.3 37.9 16.4 38.6 26.7 31.0 28.2 29.5 20.3 44.4 39.0 16.9 23.4 42.4 29.3 23.2 12.8 16.1 33.7 36.6 14.9 23.6 14.6 10.8 29.2 47.4 27.3 12.2 Figure 3 presents descriptive summaries of the data in the 3 groups in JMP, and Figure 4 presents an inferential summary of a 1-way analysis of variance (ANOVA) based on these data. (a) Make a table with three columns (Line, Mean, SD) and three rows (RS, SS, NS) and fill in the means and SDs for each of the 3 genetic lines. [5 points] 13Explanation / Answer
(a)
(i)
Using one way anova, mean levels of fecundity differ significantly across three lines as p-value is less than 0.05.
(ii)
According to figure 3. normality assumptions are fulfilled. Also if we explore normality using tests like Kolomogrov-Smirnov and Shapiro-Wilk tests, we have results below
Since, Kolomogrov-Smirnov and Shapiro-Wilk p-values are >0.05, which clearly favors the normality of the data across all the three groups.
Descriptive Statistics Factor N Mean Std. Deviation Resistant (RS) Level 25 25.2560 7.77239 Valid N (listwise) 25 Susceptible (SS) Level 26 24.0808 9.84561 Valid N (listwise) 26 Nonselected (NS) Level 24 33.2875 9.12413 Valid N (listwise) 24Related Questions
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