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Back to 8.4 Calculating the Sample Size n: Continuous and Binary Random Variables

8.4 Exercise 2

Avg difficulty 2.5

Suppose an internet marketing company wants to determine the current percentage of customers who click on ads on their smartphones. How many customers should the company survey in order to be 90% confident that the estimated proportion is within five percentage points of the true population proportion of customers who click on ads on their smartphones?

OpenStax Introductory Business Statistics 2e, 8.4 Calculating the Sample Size n: Continuous and Binary Random Variables, exercise 2

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Adapted from Introductory Business Statistics 2e © 2023 Rice University. Licensed under CC BY 4.0. Source: Introductory Business Statistics 2e. Imported at revision 50ec917.