EBK BUSINESS ANALYTICS
3rd Edition
ISBN: 9780136880844
Author: Evans
Publisher: PEARSON
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Textbook Question
Chapter A3, Problem 1PE
Create a treemap for the regions, items, and units sold in the Excel file Store and Regional Sales Database.
Expert Solution & Answer
To determine
To create a Tree map for the regions, items, and unit sold.
Explanation of Solution
Given:
The data contains ID, Store No., Sales region, Item number, Item description, Unit price, unit sold and week ending.
To create tree map, need to select column of regions, item description, and unit sold.
Now select Insert→Insert Hierarchy chart→Treemap
Following is the Tree map:
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Students have asked these similar questions
(c) Because logistic regression predicts probabilities of outcomes, observations used to build a logistic regression model need not be independent.
A. false: all observations must be independent
B. true
C. false: only observations with the same outcome need to be independent
I ANSWERED: A. false: all observations must be independent.
(This was marked wrong but I have no idea why. Isn't this a basic assumption of logistic regression)
Business discuss
Spam filters are built on principles similar to those used in logistic regression. We fit a probability that each message is spam or not spam. We have several variables for each email. Here are a few: to_multiple=1 if there are multiple recipients, winner=1 if the word 'winner' appears in the subject line, format=1 if the email is poorly formatted, re_subj=1 if "re" appears in the subject line. A logistic model was fit to a dataset with the following output:
Estimate
SE
Z
Pr(>|Z|)
(Intercept)
-0.8161
0.086
-9.4895
0
to_multiple
-2.5651
0.3052
-8.4047
0
winner
1.5801
0.3156
5.0067
0
format
-0.1528
0.1136
-1.3451
0.1786
re_subj
-2.8401
0.363
-7.824
0
(a) Write down the model using the coefficients from the model fit.log_odds(spam) = -0.8161 + -2.5651 + to_multiple + 1.5801 winner + -0.1528 format + -2.8401 re_subj(b) Suppose we have an observation where to_multiple=0, winner=1, format=0, and re_subj=0. What is the predicted probability that this message is spam?…
Chapter A3 Solutions
EBK BUSINESS ANALYTICS
Ch. A3 - Create a treemap for the regions, items, and units...Ch. A3 - Create a sunburst chart for the regions, items,...Ch. A3 - Use PivotTables to find the number of loans by...Ch. A3 - Use PivotCharts to create a useful dashboard for...Ch. A3 - Prob. 6PECh. A3 - Use PivotCharts to create a useful dashboard for...Ch. A3 - Prob. 9PE
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