Question

In: Statistics and Probability

1. The manager of a local fast-food chain wants to improve the service provided to customers...


1. The manager of a local fast-food chain wants to improve the service provided to customers who use the drive-up window. As a first step in this process, the manager records how long it takes from the time the customer first enters the drive-in window until they are served their food at the final window. Below are the times (in minutes) for the 30 customers (in order):
3 4 5 6 6 7 9 10 11 11 12 12 12 12 13 15 16 16 17 17 18 18 18 20 21 22 24 25 33 40
(a) Calculate the median. [2 marks]
(b) Calculate the first and third quartile. [2 marks]
ANSWER:
Q1 Q3 (c) Calculate the interquartile range. [1 mark]
IQR:
(d) Calculate the lower and upper limits [2 marks]
Lower Upper
(e) List all outliers. Explain why they would be considered outliers. [3 marks]
ANSWER:
(f) Where would the whiskers on a boxplot of the times extend to on each side? [2 marks]
Low Side: High Side:

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

The manager of a local fast-food restaurant is concerned about customers who ask for a water...
The manager of a local fast-food restaurant is concerned about customers who ask for a water cup when placing an order but fill the cup with a soft drink from the beverage fountain instead of filling it with water. The manager selected a random sample of 50 customers who asked for a water cup when placing an order and found that 8 of those customers filled the cup with a soft drink from the beverage fountain. (a) Find the sample...
The manager of a fast-food restaurant wants to reduce the proportion of drive-through customers who have...
The manager of a fast-food restaurant wants to reduce the proportion of drive-through customers who have to wait longer than 2 minutes to receive their food after placing an order. Based on store records, the proportion of customers who had to wait longer than 2 minutes was p = 0.63. To reduce this proportion, the manager assigns an additional employee to assist with drive-through orders. During the next month, the manager will collect and random sample of drive through times...
A worldwide fast food chain was bought out in a hostile takeover. Longtime customers are suspicious...
A worldwide fast food chain was bought out in a hostile takeover. Longtime customers are suspicious that the new owners have changed the chain’s famous “Big Bucket o’Fries” and don’t include the same number of fries. Prior to the takeover, the average number of fries included was 40 (SD = 3). These loyal customers with too much time on their hands purchased 9 buckets and counted the number of fries in each (before scarfing them down), here are their numbers:...
The manager of a fast-food restaurant determines that the average time that her customers wait for...
The manager of a fast-food restaurant determines that the average time that her customers wait for service is 5.5 minutes. (a) Find the probability that a customer has to wait more than nine minutes. (Round your answer to three decimal places.) (b) Find the probability that a customer is served within the first five minutes. (Round your answer to three decimal places.) (c) The manager wants to advertise that anybody who isn't served within a certain number of minutes gets...
As a shift manager at a local fast food place, you are responsible for ensuring quality...
As a shift manager at a local fast food place, you are responsible for ensuring quality control. You do not want to weigh all the frozen hamburger patties that get delivered by your supplier to make sure they weigh four ounces on average, so you choose 25 patties at random. You calculate that the sample mean weight of patties is 3.4 ounces and the standard deviation of the weight of hamburger patties to be 0.5 ounces. (a) Test the hypothesis...
1.A fast-food restaurant selling soft drinks advertises that they contain 15 ounces. A manager wants to...
1.A fast-food restaurant selling soft drinks advertises that they contain 15 ounces. A manager wants to find out whether the drinks are being overfilled. A random sample of 10 independently chosen drinks produced a mean of 15.6 ounces with a standard deviation of 0.4 ounce. Assume that the distribution of serving sizes in the population is Normally distributed. Carry out the appropriate hypothesis test using a 1% significance level. Explain what conclusion the manager should reach. 2.The mean weight of...
The Fast N' Hot food chain wants to test if their "Buy One, Get One Free"...
The Fast N' Hot food chain wants to test if their "Buy One, Get One Free" program increases customer traffic enough to support the cost of the program. For each of 15 stores, one day is selected at random to record customer traffic with the program in effect, and one day is selected at random to record customer traffic with program not in effect. The results of the experiment are documented in DATA. For each store, compute difference = traffic...
The Fast N' Hot food chain wants to test if their "Buy One, Get One Free"...
The Fast N' Hot food chain wants to test if their "Buy One, Get One Free" program increases customer traffic enough to support the cost of the program. For each of 15 stores, one day is selected at random to record customer traffic with the program in effect, and one day is selected at random to record customer traffic with program not in effect. The results of the experiment are documented in DATA. For each store, compute difference = traffic...
EatWell Inc., a large fast-food chain company of Canada, wants to test two versions of a...
EatWell Inc., a large fast-food chain company of Canada, wants to test two versions of a new product before launching its full production. They select a random sample of individuals among their regular clients and ask them to participate in an experiment to rate the product according to an assessment grid worth 20 points. The 15 individuals who accepted to participate had to come to a specific company location on two occasions during a given week to test the two...
Chic-fil-A is a US restaurent fast food chain and the industry is fast food market.Porter's 5...
Chic-fil-A is a US restaurent fast food chain and the industry is fast food market.Porter's 5 force analysis can be applied as below: Bargaining power of buyers: Low: -The number of customer ie the customer base is huge. -Customers have their own taste and choices and they tend to stick to their preferred brands. -Cost of switching is low Bargaining power of Suppliers:Low -Cost cost of switching suppliers -Large number of suppliers available -Lot of substitutes available -Suppliers have short...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT