Can you please tell me what more information I need to provide to solve below problem? 1....

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Can you please tell me what more information I needto provide to solve below problem?
1. Find out below using R
Hints: Use iris dataset from R (built in data set inR)
a) Create a new data frame called virginica.versicolor(that only contains these two species)
the command I used:
virginica.versicolor <- iris[iris$Species %in%c(\"versicolor\", \"virginica\"), ]
b) What is your null hypothesis regarding sepal lengths for thetwo species (virginica.versicolor) ? And what isyour alternate hypothesis?
c) Describe your hypotheses in terms of your test statistic:what would be the t under the null hypothesis,H₀, and what would be the statement aboutt under your alternate hypothesis Ha?
d) Would you do a one- or non-(i.e., two-sided) directionaltest? Why?
e) Conduct a Studentâ€™s t-test usingthe formula format as follows:
t.test(sepal.length ~ species, data = virginica.versicolor,var.equal = T).
f) Explain what the three different sections do within thet.test() function.
g) Did your function run a one- or non-directional test?
h) What is your t-value? Based on the results of your t-test,what is your conclusion and why?

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3.5 Ratings (518 Votes)

a Create data frame virginicaversicolor Code datairis virginicaversicolor tcritical It means that the alternate hypotesis is accepted if the test statistic t tcritical d Since we will be testing if there is a difference in the sepal lengths of the two species and not testing if one species sepal length is greatersmaller than See Answer

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