i. Define your null and alternate hypotheses to answer the following question: do the Caniformia and Feliformia SuperFamilies have different average gestation length?

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what would be our null and alternative hypothesis here

The \texttt{carnivora} data set found in the \texttt{ape} package contains several parameters
related to carnivorous species. Of interest to us here is the gestation length (in days) of the two
SuperFamilies: Caniformia and Feliformia.
The following code will give you the sample statistics for the GL (gestation length) of the two
SuperFamilies. These are the two groups we will consider for the problems ahead.
{r}
(d <- carnivora %>%
select(SuperFamily, GL) %>% # only two columns
na.omit() %>% # be careful with placement
group_by (SuperFamily) %>% # mean/var by SuperFamily
summarise(n=n(), sd=sd(GL), xbar=mean (GL)))
A tibble: 2 x 4
SuperFamily
<fctr>
Caniformia
Feliformia
2 rows
n
<int
sd
<dbl>
xbar
<dbl>
5... 25.824...
58.363...
3... 17.270... 75.682...
<<
i. Define your null and alternate hypotheses to answer the following question: do the Caniformia and
Feliformia SuperFamilies have different average gestation length?
Transcribed Image Text:The \texttt{carnivora} data set found in the \texttt{ape} package contains several parameters related to carnivorous species. Of interest to us here is the gestation length (in days) of the two SuperFamilies: Caniformia and Feliformia. The following code will give you the sample statistics for the GL (gestation length) of the two SuperFamilies. These are the two groups we will consider for the problems ahead. {r} (d <- carnivora %>% select(SuperFamily, GL) %>% # only two columns na.omit() %>% # be careful with placement group_by (SuperFamily) %>% # mean/var by SuperFamily summarise(n=n(), sd=sd(GL), xbar=mean (GL))) A tibble: 2 x 4 SuperFamily <fctr> Caniformia Feliformia 2 rows n <int sd <dbl> xbar <dbl> 5... 25.824... 58.363... 3... 17.270... 75.682... << i. Define your null and alternate hypotheses to answer the following question: do the Caniformia and Feliformia SuperFamilies have different average gestation length?
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