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

Magic realm, inc., has developed a new fantasy board game. the company sold 15,000 games last year at a selling price of $20 per game. fixed expenses associated with the game total $182,000 per year, and variable expenses are $6 per game. production of the game is entrusted to a printing contractor. variable expenses consist mostly of payments to this contractor.required: 1-a. prepare a contribution format income statement for the game last year.1-b. compute the degree of operating leverage.2. management is confident that the company can sell 58,880 games next year (an increase of 12,880 games, or 28%, over last year). given this assumption: a. what is the expected percentage increase in net operating income for next year? b. what is the expected amount of net operating income for next year? (do not prepare an income statement; use the degree of operating leverage to compute your answer.)