A small business owner has collected data on advertising expenditure (

A small business owner has collected data on advertising expenditure (in thousands of dollars) and sales (in thousands of units) over the past 8 months.Month: 1 2 3 4 5 6 7 8Expenditure: 1 3 5 4 2 4 3 2Sales: 30 40 40 50 30 50 40 40(a) Compute the sample mean and sample standard deviation of the expenditure data.(b) The sample mean of the sales data is 40 thousand units, and the sample standard deviation is 7.56 thousand units. Which is more variable, the expenditure data or the sales data? Explain.

A small business owner has collected data on advertising expenditure (

A small business owner has collected data on advertising expenditure (in thousands of dollars) and sales (in thousands of units) over the past 8 months.Month: 1 2 3 4 5 6 7 8Expenditure: 1 3 5 4 2 4 3 2Sales: 30 40 40 50 30 50 40 40(a) Compute the sample mean and sample standard deviation of the expenditure data.(b) The sample mean of the sales data is 40 thousand units, and the sample standard deviation is 7.56 thousand units. Which is more variable, the expenditure data or the sales data? Explain.