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In 2017, Americans spent a record-high $9.1 biltion on Halloween-rela.pdf

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Americans spent a record $9.1 billion on Halloween in 2017. Sample data shows how much 16 adults spent on costumes. The estimates are: a) the population mean amount spent is $29.38, b) the sample standard deviation is $15.23, and c) the 95% confidence interval for the population standard deviation is $12.35 to $21.11.

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In 2017, Americans spent a record-high $9.1 biltion on Halloween-related purchases (the balance website). Sample data showing the amount, in dollars, 16 adults spent on a Halloween costume are as follows. a. What is the estimate of the population mean amount adults spend on a Halloween costume (to 2 decimals)? b. What is the sample standard deviation (to 2 decimals)? c. Provide a 95% confidence interval estimate of the population standard deviation for the amount adults spend on a Halloween costume (to 2 decimals). Use Table 11.1.

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In 2017, Americans spent a record-high $9.1 biltion on Halloween-rela.pdf

  • 1. In 2017, Americans spent a record-high $9.1 biltion on Halloween-related purchases (the balance website). Sample data showing the amount, in dollars, 16 adults spent on a Halloween costume are as follows. a. What is the estimate of the population mean amount adults spend on a Halloween costume (to 2 decimals)? b. What is the sample standard deviation (to 2 decimals)? c. Provide a 95% confidence interval estimate of the population standard deviation for the amount adults spend on a Halloween costume (to 2 decimals). Use Table 11.1.