Q57. A bookstore in your city claims tht fiction books have more sales in the second half of the year than in the first half. Average monthly sales for a sample of fiction books sold at bookstores throughout the city over a period of oneyear provides the following data for gross earnings (in dollars) during the two halves of the year. Year: first half n = 194; mean = 17947; sd = 2047; min = 10931; max = 23454 year: second half n = 305; mean = 38832; sd = 1259; min = 22343; max = 53347 Q58. Book sales, part 2. Here is some additional information about the fiction books' sales data presented in exercise 57. It is generally thought that sales spike during the year-end holidays. So the sales during year-end holidays were omitted, and the new summary statitics was determined as given below. Year: first half n = 194; mean = 17947; sd = 2047; min = 10931; max = 23454 year: second half n = 248; mean = 21861; sd = 1083; min = 19972; max = 25396 Do sales appear to be higher during the second half of the year after omitting those data most influenced by year-end holidays? a) write the null and alternative hypothesis. b) test the null hypotehsis, and state your conclusion. c) Suggest additional factors that may influence fiction book's sales not accounted for in this exercise.
Q57. A bookstore in your city claims tht fiction books have more sales in the second half of the year than in the first half. Average monthly sales for a sample of fiction books sold at bookstores throughout the city over a period of oneyear provides the following data for gross earnings (in dollars) during the two halves of the year. Year: first half n = 194; mean = 17947; sd = 2047; min = 10931; max = 23454 year: second half n = 305; mean = 38832; sd = 1259; min = 22343; max = 53347 Q58. Book sales, part 2. Here is some additional information about the fiction books' sales data presented in exercise 57. It is generally thought that sales spike during the year-end holidays. So the sales during year-end holidays were omitted, and the new summary statitics was determined as given below. Year: first half n = 194; mean = 17947; sd = 2047; min = 10931; max = 23454 year: second half n = 248; mean = 21861; sd = 1083; min = 19972; max = 25396 Do sales appear to be higher during the second half of the year after omitting those data most influenced by year-end holidays? a) write the null and alternative hypothesis. b) test the null hypotehsis, and state your conclusion. c) Suggest additional factors that may influence fiction book's sales not accounted for in this exercise.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 94E
Related questions
Question
Pppppvvvv
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Recommended textbooks for you
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
College Algebra (MindTap Course List)
Algebra
ISBN:
9781305652231
Author:
R. David Gustafson, Jeff Hughes
Publisher:
Cengage Learning
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
College Algebra (MindTap Course List)
Algebra
ISBN:
9781305652231
Author:
R. David Gustafson, Jeff Hughes
Publisher:
Cengage Learning
Algebra: Structure And Method, Book 1
Algebra
ISBN:
9780395977224
Author:
Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:
McDougal Littell
College Algebra
Algebra
ISBN:
9781305115545
Author:
James Stewart, Lothar Redlin, Saleem Watson
Publisher:
Cengage Learning
Mathematics For Machine Technology
Advanced Math
ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,