Solutions Manual for

Solutions Manual for Business Analytics, Communicating with Numbers, 2e Sanjiv Jaggia, Alison Kelly, Kevin Lertwachara, Leida Chen (All Chapters Download Link is at the end of this file)

• / 3

Chapter 01 – Introduction to Business Analytics Chapter 1. Introduction to Business Analytics Solutions 1.a.The relevant population consists of all Americans.b.The estimates for averages are based on sample data.

2.The value 35 is the estimated average age of the population. It is both costly and time consuming (likely impossible) to take a census of all video game players and compute the actual average age.

3.a.The population is all students enrolled in the accounting class.b.The value 3.29 represents the population parameter since we are not choosing a sample but drawing results from the actual population.

4.a.The population is all recent college graduates with an engineering degree.b.No, the average salary is a sample statistic computed from a sample, not the population.

5.a.The population is all elderly people. The sample consists of 949 elderly people.b.22% and 17% represent sample statistics. 2 / 3

Chapter 01 – Introduction to Business Analytics 6.The data are cross-sectional data.

Note: Data will vary due to the nature of sampling.

7.The data are time series data.Note: Data will vary depending on the date of retrieval. These data were retrieved July 2019.Date Adj. Close Price

7/1/2018 192.55

8/1/2018 195.72

9/1/2018 202.97

10/1/2018 172.33

11/1/2018 176.68

12/1/2018 169.36

1/1/2019 180.90

2/1/2019 182.49

3/1/2019 189.15

4/1/2019 202.28

5/1/2019 188.53

6/1/2019 206.52

• The front page of the New York Times website is likely to be textual (written

reports) with multimedia contents (photographs, etc.). The resulting data are unstructured in that they do not conform to a predefined row-column format.

• Data on price and fuel economy of small hybrid vehicles can be specified in a

predefined row-column format, and therefore, are structured.

Note: Data will vary due to the nature of sampling.

10.The data for Under Armour’s annual revenue are structured since they are specified in a well-defined row-column format. The data are time series data.

Note: Data will vary depending on the date of retrieval. These data were

retrieved July 2019.Year Annual Revenue (in $ millions)

2018 $5,193

2017 $4,989

2016 $4,833

2015 $3,963

2014 $3,084

2013 $2,332

• / 3