Answered 2017, Americans spent a record-high $9.1 billion on Halloween-related purchases (the balance website). Sample data showing the amount, in dollars, 16 adults spent on a Halloween costume are as follows. 22 33 16 66 a. What is the estimate of the population mean amount adults spend on a Halloween costume (to 2 decimals)? $ 13 33 50 44 69 38 16 32 Hint(s) Check My Work 63 43 98 23 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.

4.2017, Americans spent a record-high 50.1 bilion on Halloweenrelated purchases (the bulance website)- 5 ample datra stiowing the amount, in cotars, 16 advits spent on a Halloween costurne are as followi. a. What ia the estimate of the population mean amount aduite spend on a Halloween costume (to 2 decimals)? 8 b. What is the sample standard deviation (to 2 decimais)? 13 c. Provide a 95% confidence interval estimate of the population standard devistion for the amount adults spend on a ialloweericostume (to 2 deomals). Use fable 1