n Internet poll asked 4272 U.S. adults about their use of smart watches and ﬁtness trackers. A summary of the results reported that 897 adults regularly wear a smart watch or ﬁtness tracker. Identify the sample size and the count. Calculate the sample proportion. Explain the relationship between the population proportion and the sample proportion.

n Internet poll asked 4272 U.S. adults about their use of smart watches and ﬁtness trackers. A summary of the results reported that 897 adults regularly wear a smart watch or ﬁtness tracker. Identify the sample size and the count. Calculate the sample proportion. Explain the relationship between the population proportion and the sample proportion.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 3E

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Question

An Internet poll asked 4272 U.S. adults about their use of smart watches and ﬁtness trackers. A summary of the results reported that 897 adults regularly wear a smart watch or ﬁtness tracker.

Identify the sample size and the count.
Calculate the sample proportion.
Explain the relationship between the population proportion and the sample proportion.

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

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