Mathematics, 10.03.2020 08:30 EssenceBlocker144
A market researcher is studying on-line subscription services. She is particularly interested in what variables relate to the number of subscriptions for a particular on-line service. She is able to obtain the following sample information on 25 on-line subscription services. The following notation is used: Sub Number of subscriptions (in thousands) Web page hits Average monthly count (in thousands) Adv The advertising budget of the service (in $ hundreds) Price = Average monthly subscription price ($) Web Page Service Sub Hits AdvPrice 1 37.95 588.9 13.2 35.1 2 37.66 585.3 13.2 34.7 3 37.55 566.3 19.8 34.8 23 38.83 629.6 22.0 35.3 24 38.33 680.0 24.2 34.7 25 40.24 651.2 33.0 35.8 a. Determine the regression equation. b. Conduct a global test of hypothesis to determine whether any of the regression coefficients are not equal to zero. c. Conduct a test for the individual coefficients. Would you consider deleting any coefficients? d. Determine the residuals and plot them against the fitted values. Do you see any problems? e. Develop a histogram of the residuals. Do you see any problems with the normality assumption?
Answers: 3
Mathematics, 21.06.2019 13:40
Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?
Answers: 1
Mathematics, 21.06.2019 18:40
Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.
Answers: 3
Mathematics, 22.06.2019 00:30
Answer 20 points and brainiest ! on the board, your teacher writes an example of how to find the median. one of the numbers is erased, leaving what is shown, 18, 30, 26,12 22. what is the median? a. 10 b. 20 c. 24 d. 28
Answers: 2
Mathematics, 22.06.2019 04:00
What ordered pair represents this equation? 3x-y=8 and x+y=2
Answers: 1
A market researcher is studying on-line subscription services. She is particularly interested in wha...
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