I need help finding the answers to the questions in the attached document. Can you help me compute the results for part c of the attached document?

Americans spend nearly $7 billion on Halloween costumes and decorations. Sample data showing the amount, in dollars, 16 adults spent on a Halloween costume an Excel Online le below. Construct a spreadsheet to answer the following questions. Open spreadsheet a. What is the point 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)? $ 505$ Dollars Spent Part a Formula 7 12 Mean I:|:: 71 I 7 23 Part b 7 65 Standard Deviation ::, 35 33 Part c 7 34 Degrees of Freedom :: 43 7 54 Lower Limit Critical Chi-square : 19 Upper Limit Critical Chi-square 7 11 96 The 95% condence interval 43 C.|.Lower Limit 7 32 C.|.Upper Limit : 65 24