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

8.4 Exercise 23

Avg difficulty 2.5


Use the following information to answer the next ten exercises: A sample of 20 heads of lettuce was selected. Assume that the population distribution of head weight is normal. The weight of each head of lettuce was then recorded. The mean weight was 2.2 pounds with a standard deviation of 0.1 pounds. The population standard deviation is known to be 0.2 pounds.

What would happen if 40 heads of lettuce were sampled instead of 20, and the error bound remained the same?

OpenStax Introductory Business Statistics 2e, 8.4 Calculating the Sample Size n: Continuous and Binary Random Variables, exercise 23

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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.