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  3. alpha value is 0.05 if it is not specified in the

alpha value is 0.05 if it is not specified in the problem. **Everything should be in...

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Statistics

alpha value is 0.05 if it is not specified in the problem.

**Everything should be in r code base.

4. Back to the iris dataset one last time! We wish to estimatethe probability of a flower’s species based on the availablemeasurements.

a. Build a Multinomial model to predict Species based onSepal.Length. Use it to estimate the probability of each speciesfor a flower with a sepal 6.3 cm long.

b. Build a Multinomial model to predict Species based onPetal.Length. Use it to estimate the probability of each speciesfor a flower with a petal 5.1 cm long.

c. Compare both the residual deviances and the AICs for the twoprevious models. Which appears to be the “better” model based onthese metrics?

d. Build a Multinomial model to predict Species based on allfour of the measurements (no interactions). Use the model toestimate the probability of each species for a flower with aSepal.Length of 6.3 cm, a Sepal.Width of 2.8 cm, a Petal.Length of5.1 cm, and a Petal.Width of 1.5 cm.

e. The flower described in part d is actually in the dataset.What species was it?

Answer & Explanation Solved by verified expert
4.5 Ratings (643 Votes)
Answer aAnswer bPart c1 Deviance is a measure ofgoodness of fit of a model Higher numbers always indicates badfit Model 1 has    See Answer
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