a(Pseudoscorpions) View(Pseudoscorpions) help(Pseudoscorpions) From the text Analysis of Biological Data, by Michael C. Whitlock and Dolph Schluter: Pseudoscorpions of the species Chordylochernes scorpioides live in tropical forests where they ride on the backs of harlequin beetles to reach rotting figs where they feed. Females of the species are promiscuous and mate with multiple males over short lifetimes. It is unclear what advantages there are for a female to mate multiple times, because the males don't help to care for her young, and mating just once provides all the sperm she needs to fertilize her eggs. One possible advantage is that the sperm of some males is genetically incompatible with a given female and, by mating multiple times, a female increases the chances of mating with at least one male whose sperm is compatible with her. To investigate this idea, Newcomer et al. (1999) recorded the number of successful broods by female pseudoscorpions randomly assigned to one of two treatments. One group of females was each mated to two different males (DM), whereas females in the other group were each mated twice to the same male (SM). By mating each female twice, the same amount of sperm was provided in both treatments, but the DM females received genetically more diverse sperm than the SM females. The Pseudoscorpions data frame gives the results of this study. From the above description, it appears that the investigators were interested in the following Research Question: On average, do female pseudoscorpions who mate with two males produce a larger number of successful broods than do female pseudoscorpions who mate with only one male? Which of the following bits of R-code would be appropriate for investigating the above Research Question? (There is more than one correct answer.) Group of answer choices ( ) densityplot(~successful.broods,data=Pseudoscorpions, xlab="Number of successful broods", main="Pseudoscorpions Study") ( ) favstats(successful.broods~treatment,data=Pseudoscorpions) barchartGC(~treatment,data=Pseudoscorpions, type="frequency", main="Pseudoscorpions Study") ( ) densityplot(~successful.broods,data=Pseudoscorpions, groups=treatment, auto.key=TRUE, xlab="Number of successful broods", main="Pseudoscorpions Study")
Pseudoscorpions: Investigating the Research Question
The data for this project is in data frame Pseudoscorpions, from package abd:
require(abd)
data(Pseudoscorpions)
View(Pseudoscorpions)
help(Pseudoscorpions)
From the text Analysis of Biological Data, by Michael C. Whitlock and Dolph Schluter:
Pseudoscorpions of the species Chordylochernes scorpioides live in tropical forests where they ride on the backs of harlequin beetles to reach rotting figs where they feed. Females of the species are promiscuous and mate with multiple males over short lifetimes. It is unclear what advantages there are for a female to mate multiple times, because the males don't help to care for her young, and mating just once provides all the sperm she needs to fertilize her eggs.
One possible advantage is that the sperm of some males is genetically incompatible with a given female and, by mating multiple times, a female increases the chances of mating with at least one male whose sperm is compatible with her. To investigate this idea, Newcomer et al. (1999) recorded the number of successful broods by female pseudoscorpions randomly assigned to one of two treatments. One group of females was each mated to two different males (DM), whereas females in the other group were each mated twice to the same male (SM). By mating each female twice, the same amount of sperm was provided in both treatments, but the DM females received genetically more diverse sperm than the SM females.
The Pseudoscorpions data frame gives the results of this study.
From the above description, it appears that the investigators were interested in the following Research Question:
On average, do female pseudoscorpions who mate with two males produce a larger number of successful broods than do female pseudoscorpions who mate with only one male?
Which of the following bits of R-code would be appropriate for investigating the above Research Question?
(There is more than one correct answer.)
xlab="Number of successful broods",
main="Pseudoscorpions Study")
type="frequency",
main="Pseudoscorpions Study")
groups=treatment,
auto.key=TRUE,
xlab="Number of successful broods",
main="Pseudoscorpions Study")
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