Chapter 11 Assignment Assignment: Chapter 11 Assignment Assignment Score: 85.71% (=~ Questions 1. 10. 11. 12. 13. 14. =] 0@ 0 0 0 0 Q0 Q0 0 0 0 & & o0 0o Submit Assignment for Grading Exercise 11.07 Algo (Inferences About a Population Variance) 4 Question 3 of 14 [ | Hint(s) Check My Work (No more tries available) | | In 2017, Americans spent a record-high $9.1 billion on Halloween-related purchases (the balance website). ! Sample data showing the amount, in dollars, 16 adults spent on a Halloween costume are as follows, 12 69 25 63 36 39 30 43 i 53 14 13 97 45 34 64 23 | a. What is the estimate of the population mean amount adults spend on a Halloween costume (to 2 decimals)? '$ 4125 f b. What is the sample standard deviation (to 2 decimals)? $ 24.75 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. |$ 18.28