Aquality analyst wants to construct a sample mean chart for controlling a packaging process. he knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces. each day last week, he randomly selected four packages and weighed each:

day weight (ounces)

monday 23 22 23 24

tuesday 23 21 19 21

wednesday 20 19 20 21

thursday 18 19 20 19

friday 18 20 22 20

if he uses upper and lower control limits of 22 and 18 ounces, on what day(s), if any, does this process appear to be out of control?

question 1 options:

monday

tuesday

monday and tuesday

monday, tuesday, and thursday

none

Lavage rapide is a canadian company that owns and operates a large automatic car wash facility near montreal. the following table provides data concerning the company’s costs: fixed cost per month cost per car washed cleaning supplies $ 0.70 electricity $ 1,400 $ 0.07 maintenance $ 0.15 wages and salaries $ 4,900 $ 0.30 depreciation $ 8,300 rent $ 1,900 administrative expenses $ 1,400 $ 0.03 for example, electricity costs are $1,400 per month plus $0.07 per car washed. the company expects to wash 8,000 cars in august and to collect an average of $6.50 per car washed. the actual operating results for august appear below. lavage rapide income statement for the month ended august 31 actual cars washed 8,100 revenue $ 54,100 expenses: cleaning supplies 6,100 electricity 1,930 maintenance 1,440 wages and salaries 7,660 depreciation 8,300 rent 2,100 administrative expenses 1,540 total expense 29,070 net operating income $ 25,030 required: calculate the company's revenue and spending variances for august.