Recently, six single-family homes in San Luis Obispo County in California sold at the following prices (in $1,000s): 633, 732, 738, 627, 804, 630. (You may find it useful to reference the ttable.) pictureClick here for the Excel Data File a. Construct the 90% confidence interval for the mean sale price in San Luis Obispo County. (Round final answers to 2 decimal places.) Confidence interval to thousands b. What assumption have you made when constructing this confidence interval? O Single family homes in San Luis Obispo follow a normal distribution. O Single family homes in San Luis Obispo need not follow a normal distribution.

1. Complete the following table showing the relation between sales and return on investment (RO). 2. What happens to the company's return on investment (RO) as sales increase? Complete this question by entering your answers in the tabs below. Complete the following table showing the relation between sales and return on investment (ROI). Note: Round your percentage answers to 2 decimal places. Posters.com is an Internet retailer of high-quaiity posters. The company has $720,000 in operating assets and fixed expenses of $159.000 per year. With this level of operating assets and fixed expenses, the company can support sales of up to $5,200,000 per year, The company's contribution margin ratio is 10%, which means an odditional dollor of sales results in additional contribution margin, and not operating income, of 10 cents. Required: 1. Complete the following table showing therelation between sales and return on investment (RO). 2. What happens to the company's return on investment (ROD) as sales increase? Complete this qutstion by entering your answers in the tabs below. What happens to the company's return on investment (ROI) as sales increase