A Cereal-Marketing Survey A food distribution company conducted a survey to determine whether a proposed premium to be included in boxes of its cereal was appealing enough to generate ne\v sales. Four cities were used as test markets, where the cereal was distributed with the premium, and four cities as control markets, where the cereal was distributed without the premium. The eight cities were chosen on the basis of their similarity in terms of population, per capita income, and total cereal purchase volume. The results are shown in the following table. Percent Change in Average Market Share per Month 1 + 18 Test cities 2 + 15 3 +7 4 + 10 1 + 1 2 -8 Control cities 3 -5 4 0 Find the standard deviation of the percent change in market share for the test cities.
A Cereal-Marketing Survey A food distribution company conducted a survey to determine whether a proposed premium to be included in boxes of its cereal was appealing enough to generate ne\v sales. Four cities were used as test markets, where the cereal was distributed with the premium, and four cities as control markets, where the cereal was distributed without the premium. The eight cities were chosen on the basis of their similarity in terms of population, per capita income, and total cereal purchase volume. The results are shown in the following table. Percent Change in Average Market Share per Month 1 + 18 Test cities 2 + 15 3 +7 4 + 10 1 + 1 2 -8 Control cities 3 -5 4 0 Find the standard deviation of the percent change in market share for the test cities.
Solution Summary: The author calculates the standard deviation of the percentage change in market share for four test cities.
A Cereal-Marketing SurveyA food distribution company conducted a survey to determine whether a proposed premium to be included in boxes of its cereal was appealing enough to generate ne\v sales. Four cities were used as test markets, where the cereal was distributed with the premium, and four cities as control markets, where the cereal was distributed without the premium. The eight cities were chosen on the basis of their similarity in terms of population, per capita income, and total cereal purchase volume. The results are shown in the following table.
Percent Change in Average Market Share per Month
1
+ 18
Test cities
2
+ 15
3
+7
4
+ 10
1
+ 1
2
-8
Control cities
3
-5
4
0
Find the standard deviation of the percent change in market share for the test cities.
x
Resorts & Spas, a magazine devoted to upscale vacations and accommodations, published its Reader's Choice List of the top 20 independent beachfront boutique hotels in the world. The data shown are the scores received by these hotels based on the results from Resorts & Spas' annual Readers' Choice Survey. Each score represents the percentage of respondents who rated a hotel as excellent or very good on one of three criteria (comfort, amenities, and in-house dining). An overall score was also reported and used to rank the hotels. The highest ranked hotel, the Muri Beach Odyssey, has an overall score of 94.3, the highest component of which is 97.7 for in-house dining. If required, round your answer to three decimal places.
Click on the datafile logo to reference the data.
Hotel
Overall
Comfort
Amenities
In-House Dining
Muri Beach Odyssey
94.3
94.5
90.8
97.7
Pattaya Resort
92.9
96.6
84.1
96.6
Sojourner's Respite
92.8
99.9
100.0
88.4…
Sherwin Williams sells paints in hardware stores across the U.S. The company maintains a large sales force who call on existing customers and look for new business. The sales manager is investigating the relationship between the # of sales calls made and the miles driven by sales representatives. Also, do the sales representatives who drive the most miles and make the most calls necessarily earn the most in sales comissions? To investigate, the VP selected a sample of 25 sales representatives and determined:
The amount earned in comissions last month (y) ; The number of miles driven last month (x1) ; The number of sales calls made last month (x2)
*See attached for information
Develop a regression equation including an interaction term. (round to 3 decimal places)
Comissions = ? + ? Calls + ? Miles + ? x1x2
Complete the following table:
Predictor
Coefficient
SE Coefficient
t
p-value
Constant
Calls
Miles
X1X2
Compute the value of…
Follow the four-step solution.
The provincial veterinarian determined that, in a certain municipality, 60% of dog owners have only one dog, 28% have two dogs, and 12% have three or more. When he conducted the survey, the following are the data: Out of 143 dog owners, 84 had one dog and 42 had two dogs. At 5%level of significance, determine whether the data collected supports the claim of the municipal veterinarian. (prepare a table showing the observed and expected frequencies).
The following are the results of the survey among two groups of respondents on their perceptions regarding the adequacy of government’s program support during the pandemic. Test, at 5%, that there is a significant difference in the responses of the two groups.
Highly adequate
Adequate
No opinion
Less adequate
Inadequate
Group A
32
68
10
60
30
Group B
40
38
12
80
60
Chapter 12 Solutions
Mathematical Ideas with Integrated Review and Worksheets plus NEW MyLab Math with Pearson eText -- Access Card Package (Integrated Review Courses in MyLab Math and MyLab Statistics)
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.
Probability & Statistics (28 of 62) Basic Definitions and Symbols Summarized; Author: Michel van Biezen;https://www.youtube.com/watch?v=21V9WBJLAL8;License: Standard YouTube License, CC-BY
Introduction to Probability, Basic Overview - Sample Space, & Tree Diagrams; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=SkidyDQuupA;License: Standard YouTube License, CC-BY