The accountant for a large medical testing company is investigating the business' operational costs and would like to determine how much of the costs are 'fixed' (those that must be paid irrespective of daily activities, such as rent and insurance) and how much are 'variable' in terms of the number of medical tests performed (e.g. labour, materials, waste disposal, etc.). The accountant has obtained last year's monthly data on total costs and the number of tests performed, which is summarised in the following table: mean std. dev. Costs (GBP, in millions) 2,517 325 Tests (count, in millions) 168 27.3 n = 12, corr. = 0.981 Use a simple linear regression to estimate the company's fixed costs and the price per test associated with the variable costs. Compute the standard error in both point estimates. Report all values correct to 2 decimal places, be careful with compound rounding errors. Managers are bidding for a contract that would result in the company conducting 280 million medical tests next month. If the company is awarded the contract, assist the accountant in estimating the expected operational costs for next month, along with an appropriate 95% interval. Comment on the reliability of the estimates