Apart from being fun, toys are an important part of the physical and mental development of children.

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Apart from being fun, toys are an important part of the physical and mental development of children. Parents play a role in assisting their children in picking the right toys. An industrial designer wants to determine the average amount of time that parents take in selecting the right toys for their children. A random sample of 36 parents yielded an average time of 19.92 minutes in selecting toys, with a sample standard deviation of 5.73 minutes. The designer requires a 95%

confidence interval estimation within 0.5 margin of error. Help the designer to calculate how many more parents she needs in order to conduct within the interval estimate.

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Business Statistics

ISBN: 9781292220383

10th Global Edition

Authors: David Groebner, Patrick Shannon, Phillip Fry

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