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Get Full Access to Introduction To The Practice Of Statistics: W/Crunchit/Eesee Access Card - 8 Edition - Chapter 8 - Problem 8.1
Get Full Access to Introduction To The Practice Of Statistics: W/Crunchit/Eesee Access Card - 8 Edition - Chapter 8 - Problem 8.1

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ISBN: 9781464158933 206

## Solution for problem 8.1 Chapter 8

Introduction to the Practice of Statistics: w/CrunchIt/EESEE Access Card | 8th Edition

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Introduction to the Practice of Statistics: w/CrunchIt/EESEE Access Card | 8th Edition

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Problem 8.1

Smartphones and purchases. A Google research study asked 5013 smartphone users about how they used their phones. In response to a question about purchases, 2657 reported that they purchased an item after using their smartphone to search for information about the item.3 (a) What is the sample size n for this survey? (b) In this setting, describe the population proportion p in a short sentence. (c) What is the count X? Describe the count in a short sentence. (d) Find the sample proportion p.

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ST 260 Chapter 5 Note. Part 1 – 2/10/14 Prof. Cali Davis Quick Recall: ­ Quantitative Variables: differences that have meaning to them, such as age, income, height, and weight. ­ Qualitative Variable (OR categorical): putting people or things into classifications. Such as: gender, race, occupation, country, or political affliction. Statistics can be described as “the science of decision­making in the face of uncertainty” (An educated guess) So how do we measure uncertainty ­ Using probability: A numerical value or measure of the LIKLIHOOD that a certain outcome or event occurs. P(A)= probability of eventA

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