See general homework tips and submit your files via the course website. Advanced Data Analysis See general homework tips and submit your files via the course website. For all exercises, use the iris data set from the SAS help (e.g. data=sashelp.iris). Exercise 1: a) Obtain box plots for sepallength by species and Read More …<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-433013","post","type-post","status-publish","format-standard","hentry","category-essay-paper-writing"],"_links":{"self":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/433013","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/comments?post=433013"}],"version-history":[{"count":0,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/433013\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/media?parent=433013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/categories?post=433013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/tags?post=433013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nFor all exercises, use the iris data set from the SAS help (e.g. data=sashelp.iris).
\nExercise 1:<\/strong>
\na) Obtain box plots for sepallength by species and comment on any differences you notice
\nbetween the different species\u2019 sepal lengths.
\nb) Obtain basic descriptive statistics for the sepal lengths for all species together. Comment on any
\ngeneral features of the data (e.g. typical sepal lengths, range of values, etc.). Also visually and
\nquantitatively check if an assumption of normality would be reasonable for the underlying
\npopulation.
\nc) Obtain basic descriptive statistics and visually and quantitatively check the assumption of
\nnormality for sepallength by species. Comment on how the species-wise statistics differ from
\nthose for all species combined, and comment on the conclusions of the species-wise normality
\ntests.
\nExercise 2:<\/strong>
\na) Test the null hypothesis that the true mean or median sepal length is 60 against the alternative
\nthat it is not 60. Based on the normality tests from Exercise 1, which location test should we use
\nand what do we conclude about the true mean or median sepal length of the population?
\nb) Of the three species, Virginica has the highest mean and median sepal length, but is it
\nsignificantly greater than the general population? Use the sample median for sepal length of all
\nspecies as the null value and perform a t, sign, or signed rank test to test whether Virginica has
\nsignificantly larger sepal length compared to the general population. (Note: you should have the
\nmedian value in results from Exercise 1, and tests from Exercise 1 should also tell you whether
\nto use a t test or one of the rank-based tests).
\nc) Consider the Setosa and Versicolor sepal lengths. Test for differences of the two populations
\n(e.g. test for a difference of mean or median if appropriate or test if one population is
\nstochastically greater if testing the difference of means would not be appropriate), and state
\nyour conclusion.
\nExercise 3:<\/strong>
\na) Obtain the Pearson correlation matrix for the entire data set. Comment on what the results tell
\nus about significant relationships between the four length and width measurements.
\nb) Obtain the Pearson correlation matrix by species. Comment on what the results tell us about
\nsignificant relationships between the four length and width measurements for each species and
\nhow these relationships compare with those noted for the entire population.<\/p>\n","protected":false},"excerpt":{"rendered":"