Customers at Ingles have a choice when paying for their groceries. They may check out and...

Transcribed Image Text:

Customers at Ingles have a choice when paying for their groceries. They may check out and pay using the standard cashier assisted checkout, or they may use a new U-Scan procedure. In the standard procedure an Ingles employee scans each item and another employee puts it in a bag and then into the grocery cart. In the U-Scan procedure the customer scans each item, bags it, and places the bags in the cart themselves. The U-Scan procedure is designed to reduce the time a customer spends in the check out line. The store manager wants to know if the mean checkout time using the standard checkout method is LONGER than using the U-Scan. She gathered the following sample information. The time is measured from when the customer enters the line until their bags are in the cart. Hence the time includes both waiting in line and checking out. Mean (Minutes) Standard Deviation (Minutes) Sample Size Standard 5.5 0.4 50 U-Scan 5.3 0.3 100 a. What are the null and alternative hypotheses that management would be testing? b. If a = .05 and if the analysis output shows that p-value -0.0013, can you reject Ho? Why or why not? c. Can we conclude that the U-Scan system is better than the standard checkout? Yes or No? Explain Customers at Ingles have a choice when paying for their groceries. They may check out and pay using the standard cashier assisted checkout, or they may use a new U-Scan procedure. In the standard procedure an Ingles employee scans each item and another employee puts it in a bag and then into the grocery cart. In the U-Scan procedure the customer scans each item, bags it, and places the bags in the cart themselves. The U-Scan procedure is designed to reduce the time a customer spends in the check out line. The store manager wants to know if the mean checkout time using the standard checkout method is LONGER than using the U-Scan. She gathered the following sample information. The time is measured from when the customer enters the line until their bags are in the cart. Hence the time includes both waiting in line and checking out. Mean (Minutes) Standard Deviation (Minutes) Sample Size Standard 5.5 0.4 50 U-Scan 5.3 0.3 100 a. What are the null and alternative hypotheses that management would be testing? b. If a = .05 and if the analysis output shows that p-value -0.0013, can you reject Ho? Why or why not? c. Can we conclude that the U-Scan system is better than the standard checkout? Yes or No? Explain

Answer rating: 100% (QA)

Solution Stan dard U Scan 50 M 100 x 55 g 53 S 04 SL 0 3 a ... View the full answer