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.
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter4: Polynomial And Rational Functions
Section4.6: Rational Functions
Problem 87E
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Transcribed Image Text: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.
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