11. A marketing study of 800 adults in the 18–34 age group reported the following information:

• spent less than $100 on children’s clothing per year: 75 responses • spent $100–$499.99 on children’s clothing per year: 200 responses • spent $500–$999.99 on children’s clothing per year: 25 responses • spent nothing: the remainder Develop a spreadsheet to estimate the sample mean and sample standard deviation of spending on children’s clothing for this age group using formulas (4.14) and (4.16).