A retail shop accepts only cash or checks. Suppose that 57% of its customers carry cash,...
6. Suppose that, of all the customers at a coffee shop, 70% purchase a cup of coffee; 40% purchase a piece of cake; 20% purchase both a cup of coffee and a piece of cake. Given that a randomly chosen customer has purchased a piece of cake, what is the probability that he/she has also purchased a cup of coffee?
At a particular restaurant, 54% of all customers order an appetizer and 30% of all customers order dessert. If 60% of all customers order an appetizer or dessert (or both), what is the probability a randomly selected customer orders both an appetizer and dessert? Write your answer as a decimal (not as a percentage). (If necessary, consult a list of formulas.) xs ?
At a certain fast-food restaurant, 54% of customers order a chicken sandwich, 30% of customers order french fries, and 69% of customers order a chicken sandwich or french fries (or both items). What is the probability that a randomly selected customer will order both a chicken sandwich and french fries? Write your answer as a decimal (not as a percentage). (If necessary, consult a list of formulas.) ?
10 11 12 13 14 At a particular restaurant, 48% of all customers order an appetizer and 42% of all customers order dessert. If 67% of all customers order an appetizer or dessert (or both), what is the probability a randomly selected customer orders both an appetizer and dessert? Write your answer as a decimal (not as a percentage). (If necessary, consult a list of formulas.)
Question 4 (2 points) An automobile insurance company divides customers into three categories: good risks, medium risks, and poor risks. Assume that of a total of 12,573 customers, 6,524 are good risks, 1,190 are medium risks, and the rest are poor risks. As part of an audit, one customer is chosen at random. What is the probability that the customer is not a poor risk? Write only a number as your answer. Round to two decimal places (for example: 0.43)....
At Elmo's, an old-fashioned barber shop in Melbourne, Florida, 66% of all customers get a haircut, 49% get a shave, and 40% get both. a) What is the probability that a randomly selected person doesn't get a shave and doesn't get a haircut? Your answer should have at least 3 decimal places. b) What is the probability that a randomly selected person gets a shave, given that they get a haircut? Your answer should have at least 3 decimal places.
The Pizza Shop wanted to determine what proportion of its customers ordered only cheese pizza. Out of 80 random customers surveyed, 20 ordered cheese pizza. What is the 95% confidence interval of the true proportion of customers who order only cheese pizza. Correct answer: 0.1551 < p < 0.3449 How does one obtain this answer (using a standard TI-84 Plus calculator), and why is this the correct answer?
Suppose that a major retail chain orders its human resources department to screen out all shop floor applicants who are obese, and to ask all short-listed applicants whether they have a criminal record, any history of drug abuse, or any recurring problems of mental illness. Is such a directive consistent with your ethical views? Explain your answer.
.The Baily Hill Bicycle Shop sells mountain bikes and offers a maintenance program to its customers. The manager has found the average repair bill during the maintenance program’s first year to be $15.30 with a standard deviation of $7.00. a. What is the probability a random sample of 40 customers will have a mean repair cost exceeding $16.00? b. What is the probability the mean repair cost for a sample of 100 customers will be between $15.10 and $15.80? c....
(8 points) A coffee shop sells bags of roasted coffee beans to customers to make into coffee at home. The demand for these bags is quite predictable (and can be treated as deterministic for our purposes). The shop sells 3,500 bags of coffee beans per year. Each time the shop places an order for these bags with its coffee supplier, it incurs an administrative cost of $15, independent of the quantity ordered. The company values each bag at $12.50 (this...