EP STATISTICS-ACCESS (18 WEEK)
5th Edition
ISBN: 9780135960592
Author: Sullivan
Publisher: PEARSON CO
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Chapter 15, Problem 7RE
To determine
To explain: The difference between parametric and nonparametric tests.
To determine
To identify: The parametric test that corresponds to the provided nonparametric tests.
To determine
To explain: The difference between each of the parametric and corresponding nonparametric tests.
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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 15 Solutions
EP STATISTICS-ACCESS (18 WEEK)
Ch. 15.1 - Prob. 1AYUCh. 15.1 - Prob. 2AYUCh. 15.1 - Prob. 3AYUCh. 15.1 - Prob. 4AYUCh. 15.1 - Prob. 5AYUCh. 15.1 - Prob. 6AYUCh. 15.2 - Prob. 1AYUCh. 15.2 - Prob. 2AYUCh. 15.2 - Prob. 3AYUCh. 15.2 - Prob. 4AYU
Ch. 15.2 - Prob. 5AYUCh. 15.2 - Prob. 6AYUCh. 15.2 - Prob. 7AYUCh. 15.2 - Prob. 8AYUCh. 15.2 - Prob. 9AYUCh. 15.2 - Prob. 10AYUCh. 15.2 - Prob. 11AYUCh. 15.2 - Prob. 12AYUCh. 15.2 - 13. Random Walk Down Wall Street? Does a stock...Ch. 15.2 - Prob. 14AYUCh. 15.2 - Prob. 15AYUCh. 15.2 - Prob. 16AYUCh. 15.2 - Prob. 17AYUCh. 15.2 - Prob. 18AYUCh. 15.2 - Prob. 19AYUCh. 15.2 - Prob. 20AYUCh. 15.3 - Prob. 1AYUCh. 15.3 - Prob. 2AYUCh. 15.3 - Prob. 3AYUCh. 15.3 - Prob. 4AYUCh. 15.3 - Prob. 5AYUCh. 15.3 - Prob. 6AYUCh. 15.3 - Prob. 7AYUCh. 15.3 - Prob. 8AYUCh. 15.3 - Prob. 9AYUCh. 15.3 - Prob. 10AYUCh. 15.3 - Prob. 11AYUCh. 15.3 - Prob. 12AYUCh. 15.3 - Prob. 13AYUCh. 15.3 - Prob. 14AYUCh. 15.3 - Prob. 15AYUCh. 15.3 - Prob. 16AYUCh. 15.3 - Prob. 17AYUCh. 15.3 - Prob. 18AYUCh. 15.3 - Prob. 19AYUCh. 15.3 - Prob. 20AYUCh. 15.3 - Prob. 21AYUCh. 15.3 - Prob. 22AYUCh. 15.3 - Prob. 23AYUCh. 15.4 - Prob. 1AYUCh. 15.4 - Prob. 2AYUCh. 15.4 - Prob. 3AYUCh. 15.4 - Prob. 4AYUCh. 15.4 - Prob. 5AYUCh. 15.4 - Prob. 6AYUCh. 15.4 - Prob. 7AYUCh. 15.4 - Prob. 8AYUCh. 15.4 - Prob. 9AYUCh. 15.4 - Prob. 10AYUCh. 15.4 - Prob. 11AYUCh. 15.4 - Prob. 12AYUCh. 15.4 - Prob. 13AYUCh. 15.4 - Prob. 14AYUCh. 15.4 - Prob. 15AYUCh. 15.4 - Prob. 16AYUCh. 15.4 - Prob. 17AYUCh. 15.4 - Prob. 18AYUCh. 15.4 - Prob. 19AYUCh. 15.4 - Prob. 20AYUCh. 15.4 - Prob. 21AYUCh. 15.4 - Prob. 22AYUCh. 15.4 - Prob. 23AYUCh. 15.5 - Prob. 1AYUCh. 15.5 - Prob. 2AYUCh. 15.5 - Prob. 3AYUCh. 15.5 - Prob. 4AYUCh. 15.5 - Prob. 5AYUCh. 15.5 - Prob. 6AYUCh. 15.5 - Prob. 7AYUCh. 15.5 - Prob. 8AYUCh. 15.5 - Prob. 9AYUCh. 15.5 - Prob. 10AYUCh. 15.5 - Prob. 11AYUCh. 15.5 - Prob. 12AYUCh. 15.5 - Prob. 13AYUCh. 15.5 - Prob. 14AYUCh. 15.5 - Prob. 15AYUCh. 15.5 - Prob. 16AYUCh. 15.5 - Prob. 17AYUCh. 15.5 - Prob. 18AYUCh. 15.5 - 19. Explain the primary difference between the...Ch. 15.5 - 20. For the large-sample case, the test statistic...Ch. 15.6 - In Problems 1–4, (a) draw a scatter diagram, (b)...Ch. 15.6 - Prob. 2AYUCh. 15.6 - Prob. 3AYUCh. 15.6 - Prob. 4AYUCh. 15.6 - Prob. 5AYUCh. 15.6 - Prob. 6AYUCh. 15.6 - Prob. 7AYUCh. 15.6 - Prob. 8AYUCh. 15.6 - Prob. 9AYUCh. 15.6 - Prob. 10AYUCh. 15.6 - Prob. 11AYUCh. 15.6 - Prob. 12AYUCh. 15.6 - Prob. 13AYUCh. 15.6 - Prob. 14AYUCh. 15.7 - Prob. 1AYUCh. 15.7 - Prob. 2AYUCh. 15.7 - Prob. 3AYUCh. 15.7 - Prob. 4AYUCh. 15.7 - Prob. 5AYUCh. 15.7 - Prob. 6AYUCh. 15.7 - Prob. 7AYUCh. 15.7 - Prob. 8AYUCh. 15.7 - Prob. 9AYUCh. 15.7 - Prob. 10AYUCh. 15 - Prob. 1RECh. 15 - Prob. 2RECh. 15 - Prob. 3RECh. 15 - Prob. 4RECh. 15 - Prob. 5RECh. 15 - Prob. 6RECh. 15 - 7. In general, how do parametric tests differ from...Ch. 15 - Prob. 1CTCh. 15 - Prob. 2CTCh. 15 - Prob. 3CTCh. 15 - Prob. 4CTCh. 15 - Prob. 5CTCh. 15 - Prob. 6CTCh. 15 - Prob. 7CTCh. 15 - Prob. 1CSCh. 15 - Prob. 2CS
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