# Math10Exam1AWinter2017.pdf - Exam 1B Last Name First Name...

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Chapter 9 / Exercise 48
Mathematical Practices, Mathematics for Teachers: Activities, Models, and Real-Life Examples
Larson
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Exam 1BLast NameFirst Name 95% Critical Values of the Sample Correlation Coefficient Problems 1-3 refer to the following: A marketing firms wants to determine the average income of iPhone consumers. They randomly sample 1000 customers and find they have an average income of \$52,000/year 1.What is the population in this study? a.iPhones b.Consumers c.Income d.None of the above
2.What is the parameter under study?
3.What is the statistic in the study?
4.The number of units a student takes a quarter is
Problems 5-7 Refer to the following A recent study asked 25 De Anza students the number of times a week they are on campus. Below is the recorded data:
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Chapter 9 / Exercise 48
Mathematical Practices, Mathematics for Teachers: Activities, Models, and Real-Life Examples
Larson
Expert Verified
X 1 2 3 4 5 Frequency 2 4 3 7