Question

In: Statistics and Probability

The manager is concerned that average number of customers changed compared to the 24 average that...

The manager is concerned that average number of customers changed compared to the 24 average that they had for the same period in the last year. So, they hire you to record the number of customers for two weeks and data is as follows:

20

19

25

23

17

26

15

24

29

21

26

24

23

24

Use 0.05 significant level:

                 

  1. Formulate the null and the alternate hypothesis.

  1. Find the test statistics.
  1. State the decision rule.
  1. Compute the test statistics.
  1. Make a decision if the average number of customers changed compared to the same period in the last year.

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

With the COVID-19 crisis, a manager is concerned with handling the amount of customers arriving to...
With the COVID-19 crisis, a manager is concerned with handling the amount of customers arriving to his store. The manager assumes that the number of customers, X, arriving per hour has a Poisson distribution with mean rate of 10 customers per hour. Use this distribution for exercises! 1. Use R to generate the pmf of X. 2. Use R to plot the pmf of X. 3. Give the probability that at least 11 customers arrive to the store in a...
With the COVID-19 crisis, a manager is concerned with handling the amount of customers arriving to...
With the COVID-19 crisis, a manager is concerned with handling the amount of customers arriving to his store. The manager assumes that the number of customers, X, arriving per hour has a Poisson distribution with mean rate of 10 customers per hour. Use this distribution for exercises! 1. Use R to generate the pmf of X. 2. Use R to plot the pmf of X. 3. Give the probability that at least 11 customers arrive to the store in a...
Suppose we are interested in estimating the average number of customers in the supermarket. On average,...
Suppose we are interested in estimating the average number of customers in the supermarket. On average, there are 15 customers entering the supermarket every 5 minutes. And on average, a typical customer spends about 20 minutes in the supermarket (from entering to exiting the market). a. Calculate the average number of customers in the supermarket. b. About 20% of customers leave without making a purchase. On average, a customer spends about 5 minutes in the checkout area. Estimate the average...
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 average number of sales at a car dealership is 24 with a standard deviation of...
The average number of sales at a car dealership is 24 with a standard deviation of 5. A week ago, you were promoted to manager. Over this week (seven days), the average number of sales has dipped to 20. Your boss says he is coming by tomorrow to check out how you have been doing. You know that your boss has a rule where he will fire any manager if the average number of sales is statistically lower than 24...
The manager of the local Walmart Superright is studying the number of items purchased by customers...
The manager of the local Walmart Superright is studying the number of items purchased by customers in the evening hours. Listed below is the number of items for a sample of 30 customers. 15 8 6 9 9 4 18 10 10 12 12 4 7 8 12 10 10 11 9 13 5 6 11 14 5 6 6 5 13 5 a. mean and median (Round "Mean" to 1 decimal place.) b. find the range and the standard...
Suppose the number of customers arriving at a store obeys a Poisson distribution with an average...
Suppose the number of customers arriving at a store obeys a Poisson distribution with an average of λ customers per unit time. That is, if Y is the number of customers arriving in an interval of length t, then Y∼Poisson(λt). Suppose that the store opens at time t=0. Let X be the arrival time of the first customer. Show that X∼Exponential(λ).
The average number of miles a person drives per day is 24. A researcher wishes to...
The average number of miles a person drives per day is 24. A researcher wishes to see if people over age 60 drive less than 24 miles per day. She selects a random sample of27 drivers over the age of 60 and finds that the mean number of miles driven is 22.2. The population standard deviation is miles 3.7. At a=0.05, is there sufficient evidence that those drivers over 60 years old drive less than 24 miles per day on...
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...
The manager of a grocery store has taken a random sample of 100 customers. The average...
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 4.8 minutes with a sample standard deviation of 0.5 minutes. Conduct a test to determine whether or not the mean waiting time of all customers is significantly more than 5 minutes. Use a significance level of α = 0.01.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT