Business Math (11th Edition)
11th Edition
ISBN: 9780134496436
Author: Cheryl Cleaves, Margie Hobbs, Jeffrey Noble
Publisher: PEARSON
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Chapter 17.1, Problem 13SE
To determine
To calculate: The depreciation schedule for the first year using 1.5 declining balance methods for a printing press that cost $285,900, has scrap value $3,000 and has 20 years expected life.
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(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 17 Solutions
Business Math (11th Edition)
Ch. 17.1 - Prob. 1-1SCCh. 17.1 - Prob. 1-2SCCh. 17.1 - Prob. 1-3SCCh. 17.1 - Prob. 1-4SCCh. 17.1 - Prob. 1-5SCCh. 17.1 - Prob. 2-1SCCh. 17.1 - Prob. 2-2SCCh. 17.1 - Prob. 2-3SCCh. 17.1 - Prob. 2-4SCCh. 17.1 - Prob. 3-1SC
Ch. 17.1 - Prob. 3-2SCCh. 17.1 - Prob. 3-3SCCh. 17.1 - Prob. 3-4SCCh. 17.1 - Prob. 4-1SCCh. 17.1 - Prob. 4-2SCCh. 17.1 - Prob. 4-3SCCh. 17.1 - Prob. 4-4SCCh. 17.1 - Prob. 1SECh. 17.1 - Prob. 2SECh. 17.1 - Prob. 3SECh. 17.1 - Prob. 4SECh. 17.1 - Prob. 5SECh. 17.1 - Prob. 6SECh. 17.1 - Prob. 7SECh. 17.1 - Prob. 8SECh. 17.1 - Prob. 9SECh. 17.1 - Prob. 10SECh. 17.1 - Prob. 11SECh. 17.1 - Prob. 12SECh. 17.1 - Prob. 13SECh. 17.1 - Prob. 14SECh. 17.1 - Prob. 15SECh. 17.1 - Prob. 16SECh. 17.1 - Prob. 17SECh. 17.1 - Prob. 18SECh. 17.1 - Prob. 19SECh. 17.1 - Prob. 20SECh. 17.1 - Prob. 21SECh. 17.1 - Prob. 22SECh. 17.1 - Prob. 23SECh. 17.2 - Prob. 1-1SCCh. 17.2 - Prob. 1-2SCCh. 17.2 - Prob. 1-3SCCh. 17.2 - Prob. 1-4SCCh. 17.2 - Prob. 2-1SCCh. 17.2 - Prob. 2-2SCCh. 17.2 - Prob. 2-3SCCh. 17.2 - Prob. 2-4SCCh. 17.2 - Prob. 1SECh. 17.2 - Prob. 2SECh. 17.2 - Prob. 3SECh. 17.2 - Prob. 4SECh. 17.2 - Prob. 5SECh. 17.2 - Prob. 6SECh. 17.2 - Prob. 7SECh. 17.2 - Prob. 8SECh. 17.2 - Prob. 9SECh. 17.2 - Prob. 10SECh. 17.2 - Prob. 11SECh. 17.2 - Prob. 12SECh. 17.2 - Prob. 13SECh. 17.2 - Prob. 14SECh. 17.2 - Prob. 15SECh. 17 - Prob. 1ESCh. 17 - Prob. 2ESCh. 17 - Prob. 3ESCh. 17 - Prob. 4ESCh. 17 - Prob. 5ESCh. 17 - Prob. 6ESCh. 17 - Prob. 7ESCh. 17 - Prob. 8ESCh. 17 - Prob. 9ESCh. 17 - Prob. 10ESCh. 17 - Prob. 11ESCh. 17 - Prob. 12ESCh. 17 - Prob. 13ESCh. 17 - Prob. 14ESCh. 17 - Prob. 15ESCh. 17 - Prob. 16ESCh. 17 - Prob. 17ESCh. 17 - Prob. 18ESCh. 17 - Prob. 19ESCh. 17 - Prob. 20ESCh. 17 - Prob. 21ESCh. 17 - Prob. 22ESCh. 17 - Prob. 23ESCh. 17 - Prob. 24ESCh. 17 - Prob. 25ESCh. 17 - Prob. 26ESCh. 17 - Prob. 27ESCh. 17 - Prob. 28ESCh. 17 - Prob. 29ESCh. 17 - Prob. 30ESCh. 17 - Prob. 31ESCh. 17 - Prob. 32ESCh. 17 - Prob. 33ESCh. 17 - Prob. 34ESCh. 17 - Prob. 35ESCh. 17 - Prob. 36ESCh. 17 - Prob. 37ESCh. 17 - Prob. 38ESCh. 17 - Prob. 39ESCh. 17 - Prob. 40ESCh. 17 - Prob. 1PTCh. 17 - Prob. 2PTCh. 17 - Prob. 3PTCh. 17 - Prob. 4PTCh. 17 - Prob. 5PTCh. 17 - Prob. 6PTCh. 17 - Prob. 7PTCh. 17 - Prob. 8PTCh. 17 - Prob. 9PTCh. 17 - Prob. 10PTCh. 17 - Prob. 11PTCh. 17 - Prob. 12PTCh. 17 - Prob. 1CTCh. 17 - Prob. 2CTCh. 17 - Prob. 3CTCh. 17 - Prob. 4CTCh. 17 - Prob. 5CTCh. 17 - Prob. 6CTCh. 17 - Prob. 7CTCh. 17 - Prob. 8CTCh. 17 - Prob. 1CPCh. 17 - Prob. 2CPCh. 17 - Prob. 1CS1Ch. 17 - Prob. 2CS1Ch. 17 - Prob. 3CS1Ch. 17 - Prob. 4CS1Ch. 17 - Prob. 1CS2Ch. 17 - Prob. 2CS2Ch. 17 - Prob. 3CS2
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