Branch of a fast-food chain

Reference no: EM13111973

The waiting time to place an order at a branch of a fast-food chain during the lunch hour has had population mean of 3.55 minutes, with a population standard deviation of 1.1 minute. Recently, in an effort to reduce the waiting time, the branch has experimented with a system in which there is a single waiting line. A sample of 100 customers during a recent lunch hour was selected, and their mean waiting time to place an order was 3.18 minutes. Assume that the population standard deviation of the waiting time has not changed from 1.1 minutes.

a. At the 0.05 level of significance, using the critical value approach to hypothesis testing, is there evidence that the population mean waiting time to place an order is less than 3.55 minutes?

b. At the 0.05 level of significance, using the p-value approach to hypothesis testing, is there evidence that the population mean waiting time to place an order is less than 3.55 minutes?

c. Interpret the meaning of the p-value in this problem.

d. Compare your conclusion in (a) and (b).

Reference no: EM13111973

Questions Cloud

Find expected number of times person returns : Person repeatedly and independent flips the fair coin to decide whether to take the step to left or to right from a point X. Find out expected number of times person returns to X.

Find probability that disc doesn-t touch line between planks : Find out the probability that disc doesn't touch line between two planks. Find out also expected distance from center of the disc to closest line between two planks.

Determine the codon for each mutant : Mutational changes were induced in a single codon in the gene of T4 phage. The following amino acid substitutions were observed. By following the base changes in the codons, determine the codon for each mutant.

What is the minimum number of replication : DNA (3.5 x 108 base pairs) in diploid cells of Drosophila melanogaster is replicated in about 3 minutes. Assuming that all replication forks move at a constant rate of 104 base pairs per minute, what is the minimum number of replication units pres..

Branch of a fast-food chain : The waiting time to place an order at a branch of a fast-food chain during the lunch hour has had population mean of 3.55 minutes, with a population standard deviation of 1.1 minute.

Create confidence interval using four-step process : Of 880 respondents, 171 admitted that at least one light had been red. Follow four-step process to create 95% confidence interval.

What would you advise her in terms of preventive actions : Alice expresses guilt that she may have caused Lauren's autism disorder, and is also concerned that it might occur again in future offspring. What would you advise her in terms of preventive actions, available testing, and reproduction options whe..

Find expectations of random variables : Two fair six-sided dice are tossed independently. Let X be value of first die, and Y value of second. Find out the expectations of following random variables.

Explain why the patient is experiencing shortness of breath : A 25-year-old graduate student presents to the university health center complaining of acute shortness of breath. The patient states that he returned home yesterday from a non-stop flight from Sydney, Australia.

User Account

All Pages