At LLD Records, some of the market research of college students is done during promotions on college campuses, while other market research of college students is done through anonymous mail, phone, internet, and record store questionnaires. In all cases, for each new CD the company solicits an "intent-to- purchase" score from the student, with 0 being the lowest score ("no intent to purchase") and 100 being the highest score ("full intent to purchase"). The manager finds the following information for 105 intent-to-purchase scores for a soon-to-be-released CD: 圖 Sample Sample Sample size Group mean variance On campus 21 68.9 131.8 By mail 21 59.7 128.8 Aa By phone 21 61.7 92.2 By internet 21 60.6 174.1 In a store 21 60.3 72.2 Send data to calculator Send data to Excel The manager's next step is to conduct a one-way, independent-samples ANOVA test to decide if there is a difference in the mean intent-to-purchase score for this CD depending on the method of collecting the scores. Answer the following, carrying your intermediate computations to at least three decimal places and rounding your responses to at least one decimal place. (a) What is the value of the mean square for error (the "within groups" mean square) that would be reported in the ANOVA test? (b) What is the value of the mean square for treatments (the "between groups" mean square) that would be reported in the|| ANOVA test?
At LLD Records, some of the market research of college students is done during promotions on college campuses, while other market research of college students is done through anonymous mail, phone, internet, and record store questionnaires. In all cases, for each new CD the company solicits an "intent-to- purchase" score from the student, with 0 being the lowest score ("no intent to purchase") and 100 being the highest score ("full intent to purchase"). The manager finds the following information for 105 intent-to-purchase scores for a soon-to-be-released CD: 圖 Sample Sample Sample size Group mean variance On campus 21 68.9 131.8 By mail 21 59.7 128.8 Aa By phone 21 61.7 92.2 By internet 21 60.6 174.1 In a store 21 60.3 72.2 Send data to calculator Send data to Excel The manager's next step is to conduct a one-way, independent-samples ANOVA test to decide if there is a difference in the mean intent-to-purchase score for this CD depending on the method of collecting the scores. Answer the following, carrying your intermediate computations to at least three decimal places and rounding your responses to at least one decimal place. (a) What is the value of the mean square for error (the "within groups" mean square) that would be reported in the ANOVA test? (b) What is the value of the mean square for treatments (the "between groups" mean square) that would be reported in the|| ANOVA test?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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Transcribed Image Text:At LLD Records, some of the market research of college students is done during promotions on college campuses, while other market research of college
students is done through anonymous mail, phone, internet, and record store questionnaires. In all cases, for each new CD the company solicits an "intent-to-
purchase" score from the student, with 0 being the lowest score ("no intent to purchase") and 100 being the highest score ("full intent to purchase").
The manager finds the following information for 105 intent-to-purchase scores for a soon-to-be-released CD:
圖
Sample Sample Sample
size
Group
mean
variance
On campus
21
68.9
131.8
By mail
21
59.7
128.8
Aa
By phone
21
61.7
92.2
By internet
21
60.6
174.1
In a store
21
60.3
72.2
Send data to calculator
Send data to Excel
The manager's next step is to conduct a one-way, independent-samples ANOVA test to decide if there is a difference in the mean intent-to-purchase score for
this CD depending on the method of collecting the scores.
Answer the following, carrying your intermediate computations to at least three decimal places and rounding your responses to at least one decimal place.
(a) What is the value of the mean square for error (the "within
groups" mean square) that would be reported in the ANOVA
test?
(b) What is the value of the mean square for treatments (the
"between groups" mean square) that would be reported in the|
ANOVA test?
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