The times (in minutes) required by a sample of 15 students to complete a class assignment are as follows: 45, 42, 56, 54, 40, 37, 39, 45, 49, 43, 45, 50, 49, 55, 59. What is the sample variance?

Knowledge check 01 taylor company has current sales of 1,000 units, at a selling price of $190 per unit, variable costs per unit of $76 and fixed expenses of $96,000. the company believes sales will increase by 300 units, if the company introduces sales commissions as an incentive for the sales staff. the change will decrease the selling price to $175 per unit, increase variable cost per unit to $100 and decrease fixed expenses by $20,000. what is the net operating income after the changes? increase of $21,500 decrease of $30,000 increase of $24,500 decrease of $22,000