Reiko started a business selling home medical supplies. she spent $6500 to obtain her merchandise, and it costs her $550 per week for general expenses. she eams $900 per week in sales.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

The least common denominator of 4/8 and 11/18

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.