Mean weekly earnings of a sample of 30 workers was 759 dollars with a standard deviation of 73 dollars and the mean weekly earnings of a sample of 28 workees was 658dollars with a stardand deviation of 65 dollars Construct a 80% confidence interval ?
Explain what the confidence interval mean?
Is ut reasonable to say that there is not a significant diffrence in pay between construction workers and factory workers

Shrieves casting company is considering adding a new line to its product mix, and the capital budgeting analysis is being conducted by sidney johnson, a recently graduated mba. the production line would be set up in unused space in the main plant. the machinery’s invoice price would be approximately $200,000, another $10,000 in shipping charges would be required, and it would cost an additional $30,000 to install the equipment. the machinery has an economic life of 4 years, and shrieves has obtained a special tax ruling that places the equipment in the macrs 3-year class. the machinery is expected to have a salvage value of $25,000 after 4 years of use. the new line would generate incremental sales of 1,250 units per year for 4 years at an incremental cost of $100 per unit in the first year, excluding depreciation. each unit can be sold for $200 in the first year. the sales price and cost are both expected to increase by 3% per year due to inflation. further, to handle the new line, the firm’s net working capital would have to increase by an amount equal to 12% of sales revenues. the firm’s tax rate is 40%, and its overall weighted average cost of capital, which is the risk-adjusted cost of capital for an average project (r), is 10%. define “incremental cash flow.” (1) should you subtract interest expense or dividends when calculating project cash flow?

Ann chovies, owner of the perfect pasta pizza parlor, uses 20 pounds of pepperoni each day in preparing pizzas. order costs for pepperoni are $10.00 per order, and carrying costs are 4 cents per pound per day. lead time for each order is three days, and the pepperoni itself costs $3.00 per pound. if she were to order 80 pounds of pepperoni at a time, what would be the average inventory level?

Stosch company's balance sheet reported assets of $112,000, liabilities of $29,000 and common stock of $26,000 as of december 31, year 1. if retained earnings on the balance sheet as of december 31, year 2, amount to $74,000 and stosch paid a $28,000 dividend during year 2, then the amount of net income for year 2 was which of the following? a)$23,000 b) $35,000 c) $12,000 d)$42,000