According to a survey, high school girls average 100 text messages daily (the boston globe, april 21, 2010). assume the population standard deviation is 20 text messages. suppose a random sample of 50 high school girls is taken. a. what is the probability that the sample mean is more than 105? (round answer to 4 decimal places.)

Robert owns a life insurance policy that he purchased when he first graduated college. it has a $100,000 death benefit and robert pays premiums for it every month out of his checking account. the insurance robert has is most likely da. permanent life insurance o b. term life insurance o c. group life insurance o d. individual life insurance

Exercise 2-12 cost behavior; high-low method [lo2-3, lo2-4] speedy parcel service operates a fleet of delivery trucks in a large metropolitan area. a careful study by the company’s cost analyst has determined that if a truck is driven 120,000 miles during a year, the average operating cost is 11.6 cents per mile. if a truck is driven only 80,000 miles during a year, the average operating cost increases to 13.6 cents per mile. required: 1.& 2. using the high-low method, estimate the variable and fixed cost elements of the annual cost of truck operation. (round the "variable cost per mile" to 3 decimal places.)

Who led henry fords as an entrepreneur