Question

A medium size grocery store runs its business 5 days a week for 8 hours each...

A medium size grocery store runs its business 5 days a week for 8 hours each day. The store has two counters and currently Emma and Sophia are working at the counters. On a randomly selected day, he found that Emma served 50 customers at the counter with mean service time of 4 minutes and a standard deviation of 3 minutes, Sophia served 45 customers with mean service time of 4.2 minutes and a standard deviation of 3.1 minutes. Find 90% confidence interval for the difference between mean service time of Emma and Sophia. Assume unequal variances.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A medium size grocery store runs its business 5 days a week for 8 hours each...
A medium size grocery store runs its business 5 days a week for 8 hours each day. The store has two counters and currently Emma and Sophia are working at the counters. The owner of the store wants to study the average time taken to serve a customer by Emma and Sophia. On a randomly selected day, he found that Emma served 50 customers at the counter with a mean time of 4 minutes and a standard deviation of 3...
***Please include bell shaped curve. Zingo's Grocery store claims that customers spend an average of 5...
***Please include bell shaped curve. Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at the stores deli counter. A random sample of 40 customers was timed at the deli counter, and the average service time was found to be 5.85 minutes. Historically the standard deviation for waiting time is 1.75 minutes per customer. a. Find the 95% confidence interval for the mean time that customers wait at the deli counter. b. Is there...
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 3.1 minutes. The population standard deviation is known to be 0.5 minute. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes. The test statistic is _____. a. 1.64 b. 2.00 c. 1.96 d. .056
2. The manager of a grocery store has taken a random sample of 100 customers. The...
2. 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 3.1 minutes. The population mean is 3.5 minutes and the population standard deviation is known to be 0.5 minutes. We would like to know if there is evidence of a change in average check out time. Explain in the context of this question what a type 1 error would...
you are the customer servie manager for an international grocery store company. You have reveived complaints...
you are the customer servie manager for an international grocery store company. You have reveived complaints from customers that deli counter wait times are long in your South auckland stores. You decide to take random sample of 61 wait times in your south auckland stores and compare that to a sample of 121 wait times from west auckand stores. The average deli counter wait times in south auckland from the 61 customers was 183 seconds with a sample standard deviation...
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 3.1 minutes. The population standard deviation is known at 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is significantly different than 3 minutes. Use α = 0.05. 14. The test statistic is a. 1.96 b. 1.64 c. 2.00 d. 0.056...
The manager of a grocery store has taken a random sample of 100 customers to determine...
The manager of a grocery store has taken a random sample of 100 customers to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes. She observes that the average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minutes. USE INFORMATION TO ANSWER THE FOLLOWING: 1A. What is the appropriate test to use for this problem?...
1) Consider two products A and B that have identical cost, retail price and demand parameters...
1) Consider two products A and B that have identical cost, retail price and demand parameters and the same short selling season (the summer months from May through August). The newsvendor model is used to manage inventory for both products. Product A is to be discontinued at the end of the season this year, and the leftovers will be salvaged at 75% of the cost. Product B will be re-offered next summer, so any leftovers this year can be carried...
for the scenario below: 1) Apply the qualitative analysis by identifying at least 3 issues in...
for the scenario below: 1) Apply the qualitative analysis by identifying at least 3 issues in the above process. Analyse these issues by using a. Adding-value and Waste Analysis b. Issue register, If you find that there are more than three issues, you can focus on the three issues that have the highest impact. 2). Calculate the cycle time efficiency of the as-is process. You can assume a working week of 40 hours. In case there is missing information, you...
Wal-Mart Online Wal-Mart is one of the largest companies in America. It is definitely the largest...
Wal-Mart Online Wal-Mart is one of the largest companies in America. It is definitely the largest retailer, both in terms of the number of stores (8,970 worldwide in 2011) and the level of sales ($419 billion from the 2011 Annual Report). By pushing suppliers to continually reduce costs, Wal-Mart is known for pursuing low prices and the stores often attract customers solely in-terested in lower prices. With Wal-Mart’s expansion into groceries, the company has be-come the largest retail grocer in...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT