In 2015, Mortal Kombat X was one of the most popular video games (source: Chris Morris, Mortal

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In 2015, Mortal Kombat X was one of the most popular video games (source: Chris Morris, “‘Mortal Kombat’

secrets discovered after 24 years,” http://fortune.com, Feb. 26, 2016). The file titled KOMBATX contains a sample of the retail prices paid for Mortal Kombat X in 2015.

a. Calculate a 95% confidence interval for the population mean retail price paid for Mortal Kombat X in 2015.

b. What sample size would be required to generate a margin of error of $0.25?

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In 2015, Mortal Kombat X was one of the most popular video games (source: Chris Morris, Mortal

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Business Statistics

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