Construct a histogram and comment on the process

Reference no: EM131388649

Consider the data on call waiting time of customers in a call center (given Exercise). The call center has set a goal of waiting time not to exceed 35 seconds.

(a) Test to see (using α =0.05) if conducting capability analysis using normal distribution is appropriate.

(b) If not, consider a Box-Cox transformation and conduct capability analysis. Report appropriate capability indices and the percentage non-conformance.

(d) What are the drawbacks of conducting a capability analysis using the normal distribution in this example?

Exercise
A random sample of 50 observations on the waiting time (in seconds) of customers before speaking to a representative at a call center is as follows:

33.2	29.4	36.5	38.1	30.0
29.1	32.2	29.5	36.0	31.5
34.5	33.6	27.4	30.4	28.4
32.6	30.4	31.8	29.8	34.6
30.7	31.9	32.3	28.2	27.5
34.9	32.8	27.7	28.4	28.8
30.2	26.8	27.8	30.5	28.5
31.8	29.2	28.6	27.5	28.5
30.8	31.8	29.1	26.9	34.2
33.5	27.4	28.5	34.8	30.5

(a) Construct a histogram and comment on the process.

(b) What assumptions are necessary to test if the mean waiting time is less than 32 seconds?

(d) Test to determine if the mean waiting time is less than 32 seconds. Use α =0.05.

(e) Find a 90% confidence interval for the variance of waiting time.

Reference no: EM131388649

Questions Cloud

What is the period of the pendulum for small displacements : Simple pendulum. A pendulum is constructed from a light string of length L = 100 cm and a heavy mass M = 1 X 103 g. What is the period of the pendulum for small displacements?

Explain the concept of agony of the moment : FLR2524 Diploma in Marine Surveying Assignment. Explain the concept of "agony of the moment" and provide a scenario (actual or fictitious) which demonstrates this concept. Outline the role of the Protection and Indemnity (P&I) Clubs

Draft a form of communication for each of the four scenarios : MGT 505- Choose five different communication methods listed. Draft a form of communication for each of the four scenarios listed below based on one or more of the different communication methods listed.

Give the answer of muliple choice question : A person's economic position in society, based on differences in income, wealth, and occupation, is referred to as. The upward or downward status movement of individuals or groups over time is referred to as. The idea that what is labeled deviant or ..

Construct a histogram and comment on the process : Construct a histogram and comment on the process.- What assumptions are necessary to test if the mean waiting time is less than 32 seconds?

How did completing the simulation change your perspective : MGT 437- How did completing this simulation change your perspective of project management? Provide examples in your response. What advantages and limitations of project management are identified in the simulation?

Analyze each of the elements of the given case : Analyze each of the elements of this case: the applicable defenses and the basis for the court's ruling. Analyze the possible liability in this case if the sexual harasser(s) were an independent contractor versus an employee.

Will the continuity equation be satisfied : Determine the equation for the streamlines and show a sketch of the streamline that passes through the origin. Indicate the direction of flow along this streamline.

Create a new table and rename its field id to instructor id : CS102- Create a new table and rename its field ID to Instructor ID. Add five records to this table and save it as "Instructors". You may use an instructor's name more than once to specify that she teaches multiple courses.

User Account

All Pages