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Typically, which of the following actions is NOT used to reduce process cycle time?
When σ = 10, what sample size is needed to specify a 95% confidence interval of ±3 units from the mean?
If the value of the test statistic had been 0.185, what action should have been taken regarding the null hypothesis?
A newspaper article describes a high positive correlation between obesity and orange juice consumption among six-year-olds. Parents who restrict the use of orange juice for their children have:
Which of the following control charts is most appropriate for monitoring the number of defects on different sample sizes?
There are 14 different defects that can occur on a completed time card. The payroll department collects 328 cards and finds a total of 87 defects. DPMO =:
Deming called the technique of studying a sample to gain understanding of the distribution of a population an “enumerative study.” His main objection to these studies was:
There are 14 different defects that can occur on a completed time card. The payroll department collects 328 cards and finds a total of 87 defects. DPU =
When comparing two vendors’ machines it is found that a sample of 1000 parts from machine A has 23 defectives and a sample of 1300 parts from machine B has 36 defectives. Do the data indicate that machine B has a higher rate of defectives?
(Refer to the previous problem) The variance of the five replications for each run is calculated. Most of these variances are approximately equal but two are significantly lower than the others. The experimenters would be especially interested in those two runs if they want to optimize:
This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet.
Find the approximate probability it is larger than 1/2.
A team wants a technique for obtaining a large number of possible reasons for excess variation in a dimension. They should use:
SCENARIO
A Six Sigma team is measuring the moisture content of corn starch as it leaves the conveyer belt of a dryer. They collect one sample four cups of starch at times indicated in the chart at fixed locations labeled A, B, C, and D across the end of the belt. See the diagram below.
Find the equation of the regression line for these sample data points: (1, 7) (3, 3) ( 3, 2) (5, –1)
SCENARIO A Six Sigma team is measuring the moisture content of corn starch as it leaves the conveyer belt of a dryer. They collect one sample four cups of starch at times indicated in the chart at fixed locations labeled A, B, C, and D across the end of the belt. See the diagram below.
The data for a nine hour period are:
Which type of variation dominates? (Hint: Plot the points on the graph above.)
Causes in a cause and effect diagram often include management, measurement systems, mother nature and the four standard causes:
A machine tool vender wants to sell an injection molding machine. The current machine produces 3.2% defectives. A sample of 1100 from the vender’s machine has 2.9% defective. Do these numbers indicate that the proposed machine has a lower rate of defectives?
An experiment has seven factors with two levels each. The experiment has eight runs. This experimental design is called:
A team has been asked to reduce the cycle time for a process. The team decides to collect baseline data. It will do this by:
A team’s goal is to improve information flow in a payroll function. They make thirty-three Post-It® notes, each listing an issue for further investigation. After some discussion, they group them into four categories: mandated record keeping, privacy concerns, insurance concerns and transfer concerns.
This grouping process is best described by which approach to problem solving?
This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet. Find the approximate probability it is size 3/4.
A team is investigating ways to reduce power outages. They determine that an outage can occur in only three ways: grid failure, local transformer failure or local overload. They then investigate each of these three events for possible causes, etc. They draw a diagram that “fans out” using the power outage as the handle of the fan.
These improvements are best described by which approach to problem solving?
The Central Limit Theorem states that the distribution of sample means approximates a normal distribution if:
P(A) = .42, P(B) = .58 P(A&B) = .10. Are A and B mutually exclusive (or disjoint)?
A team wants a technique for determining and displaying priorities based on frequency of various defect types. They should use:
The preferred method for determining statistically whether factor A or B is significant requires what additional information?
The support for an important quality initiative was lacking in congress until Reagan’s Secretary of Commerce was killed in a horseback riding accident in 1987. That initiative was:
This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 10?
If the value of the test statistic had been 7.03, what action should have been taken regarding the null hypothesis?
An advantage of using standard deviation rather than range for measuring dispersion of a large sample is that:
The Toyota Production System, among other things, was the birthplace for the practice of _______________.
Work performed by the payroll department is considered value added activity.
This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 11?
Lean Enterprise is based on the premise that anywhere work is being done which of these is also occurring?
TESTED 23 Dec 2024
